Apparatus and method for transmitting and receiving data in wireless communication system

ABSTRACT

A communication scheme and system for converging a 5th generation (5G) communication system for supporting a data rate higher than that of a 4th generation (4G) system with an internet of things (IoT) technology are provided. The communication scheme is applicable to intelligent services (e.g., smart homes, smart buildings, smart cities, smart cars, connected cars, health care, digital education, retail, and security and safety-related services) based on the 5G communication technology and the IoT-related technology.

CROSS-REFFERENCE TO RELATED APPLICATION(S)

This application is a continuation application of prior application Ser.No. 15/928,676, filed on Mar. 22, 2018, and was based on and claimedpriority 35 U.S.C. §119(a) of a Korean patent application number10-2017-0037143, filed on Mar. 23, 2017, in the Korean IntellectualProperty Office, the disclosure of which is incorporated by referenceherein in its entirety.

TECHNICAL FIELD

The disclosure relates to an apparatus and method for transmitting andreceiving data in a wireless communication system. More particularly,the disclosure relates to an apparatus and method for transmitting andreceiving heterogeneous service data in the wireless communicationsystem.

BACKGROUND

In order to meet the increasing demand for wireless data traffic sincethe commercialization of 4^(th) generation (4G) communication systems,the development focus is on the 5^(th) generation (5G) or pre-5Gcommunication system. For this reason, the 5G or pre-5G communicationsystem is called a beyond 4G network communication system or postlong-term evolution (LTE) system.

Implementation of the 5G communication system in millimeter wave(mmWave) frequency bands (e.g., 60 GHz bands) is being considered toaccomplish higher data rates. In order to increase the propagationdistance by mitigating propagation loss in the 5G communication system,discussions are underway about various techniques such as beamforming,massive multiple-input multiple output (MIMO), full dimensional MIMO(FD-MIMO), array antenna, analog beamforming, and large-scale antenna.

In order to enhance network performance of the 5G communication system,developments are underway of various techniques such as evolved smallcell, advanced small cell, cloud radio access network (RAN), ultra-densenetwork, device-to-device (D2D) communication, wireless backhaul, movingnetwork, cooperative communication, coordinated multi-points (CoMP), andinterference cancellation.

Furthermore, the ongoing research includes the use of hybrid frequencyshift keying (FSK) and quadrature amplitude modulation (QAM) (FQAM) andsliding window superposition coding (SWSC) as advanced coding modulation(ACM), filter bank multi-carrier (FBMC), non-orthogonal multiple access(NOMA), and sparse code multiple access (SCMA).

The Internet is evolving from a human-centric communication network inwhich information is generated and consumed by humans to the internet ofthings (IoT) in which distributed things or components exchange andprocess information. The combination of the cloud server-based Big dataprocessing technology and the IoT begets internet of everything (IoE)technology. In order to secure the sensing technology, wired/wirelesscommunication and network infrastructure, service interface technology,and security technology required for implementing the IoT, recentresearch has focused on sensor network, machine-to-machine (M2M), andmachine-type communication (MTC) technologies. In the IoT environment,it is possible to provide an intelligent Internet Technology that iscapable of collecting and analyzing data generated from connected thingsto create new values for human life. The IoT can be applied to variousfields such as smart home, smart building, smart city, smart car orconnected car, smart grid, health care, smart appliance, and smartmedical service through legacy information technology (IT) andconvergence of various industries.

Thus, there are various attempts to apply the IoT to the 5Gcommunication system. For example, the sensor network, M2M, and MTCtechnologies are implemented by means of the 5G communicationtechnologies such as beamforming, MIMO, and array antenna. Theapplication of the aforementioned cloud RAN as a big data processingtechnology is an example of convergence between the 5G and IoTtechnologies.

On the basis of diverse technological developments, it is expected thata 5G system will support more diverse services than legacy 4G systems.For example, the most representative services include an enhanced mobilebroad band (eMBB) service, an ultra-reliable and low latencycommunication (URLLC) service, a massive machine type communication(mMTC) service, and an evolved multimedia broadcast/multicast service(eMBMS). The system that provides the URLLC service may be referred toas an URLLC system, and the system that provides the eMBB service may bereferred to as an eMBB system. The terms “service” and “system” can beused interchangeably.

Among the aforementioned services, the URLLC service, which is newlyintroduced in the 5G system, unlike the legacy 4G system, has to satisfythe requirements of ultra-reliability (e.g., packet error rate of about10⁻⁵) and low latency (e.g., about 0.5 msec) that are more demanding incomparison with other services. In order to meet the challengingrequirements, the URLLC service needs to use a transmission timeinterval (TTI) shorter than that for the eMBB service, and variousoperation methods are being considered for providing the URLLC service.

The above information is presented as background information only toassist with an understanding of the disclosure. No determination hasbeen made, and no assertion is made, as to whether any of the abovemight be applicable as prior art with regard to the disclosure.

SUMMARY

Aspects of the disclosure are to address at least the above-mentionedproblems and/or disadvantages and to provide at least the advantagesdescribed below. Accordingly, an aspect of the disclosure is to providea method for mitigating performance degradation of a low priorityservice in the case of allocating part of resources reserved for the lowpriority service for the purpose of supporting a high priority servicein a situation where heterogeneous services are provided in the wirelesscommunication system.

Another aspect of the disclosure is to provide an efficient low priorityservice resource allocation information provision method of atransmitter or a base station in consideration of the capability of areceiver or a terminal.

The objects of the disclosure are not limited to the aforesaid, andother objects not described herein will be clearly understood by thoseskilled in the art from the descriptions below.

In accordance with an aspect of the disclosure, a communication methodof a terminal is provided. The communication method includestransmitting, to a base station, a first message including informationon a timing for the terminal to receive interference impact informationincluding information on an interference caused by a second signal of asecond system using a second transmission time interval (TTI) to a firstsignal of a first system using a first TTI and receiving, from the basestation, a second message including information on a timing for the basestation to transmit the interference impact information, the timingbeing determined based on the information on the timing for the terminalto receive the interference impact information. Preferably, the firstmessage further includes information indicating whether the terminal hasa capability of blindly detecting information on a portion of the firstsignal of the first system, the portion being impacted by interferencecaused by the second signal of the second system. Preferably, the timingfor the terminal to receive the interference impact informationcomprises at least one of a first timing when the first signal of thefirst system, the first signal being impacted by the interference causedby the second signal of the second signal, is transmitted and a secondtiming when a retransmission signal of the first signal of the firstsystem, the first signal being impacted by the interference caused bythe second signal of the second system, is transmitted. Preferably, thefirst system is an enhanced mobile broadband (eMBB) system, and thesecond system is an ultra-reliable and low latency communication (URLLC)system.

In accordance with another aspect of the disclosure, a communicationmethod of a base station is provided. The communication method includesreceiving, from a terminal, a first message including information on atiming for the terminal to receive interference impact informationincluding information on an interference caused by a second signal of asecond system using a second TTI to a first signal of a first systemusing a first TTI, determining a timing for the base station to transmitthe interference impact information based on the information on thetiming when the terminal is capable of receiving the interference impactinformation, and transmitting, to the terminal, a second messageincluding the information on the timing for the base station to transmitthe interference impact information. Preferably, the timing for the basestation to transmit the interference impact information includes atleast one of a first timing when the first signal of the first system,the first signal being impacted by the interference caused by the secondsignal of the second signal, is transmitted and a second timing when aretransmission signal of the first signal of the first system, the firstsignal being impacted by the interference caused by the second signal ofthe second system, is transmitted.

In accordance with another aspect of the disclosure, a terminal isprovided. The terminal includes a transceiver configured to transmit andreceive signals, and a controller configured to control to transmit, toa base station, a first message including information on a timing forthe terminal to receive interference impact information includinginformation on an interference caused by a second signal of a secondsystem using a second TTI to a first signal of a first system using afirst TTI and receive, from the base station, a second message includinginformation on a timing for the base station to transmit theinterference impact information, the timing being determined based onthe information on the timing for the terminal to receive theinterference impact information.

In accordance with another aspect of the disclosure, a base station isprovided. The base station includes a transceiver configured to transmitand receive signals, and a controller configured to control to receive,from a terminal, a first message including information on a timing forthe terminal to receive interference impact information including aninterference caused by a second signal of a second system using a secondTTI to a first signal of a first system using a first TTI, determine atiming for the base station to transmit the interference impactinformation based on the information on the timing when the terminal iscapable of receiving the interference impact information, and transmitto the terminal a second message including the information on the timingfor the base station to transmit the interference impact information.

Other aspects, advantages, and salient features of the disclosure willbecome apparent to those skilled in the art from the following detaileddescription, which, taken in conjunction with the annexed drawings,discloses various embodiments of the disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects, features, and advantages of certainembodiments of the disclosure will be more apparent from the followingdescription taken in conjunction with the accompanying drawings, inwhich:

FIG. 1 is a diagram exemplifying resources for providing an enhancedmobile broad band (eMBB) service according to an embodiment of thedisclosure;

FIG. 2 is a diagram exemplifying resources for providing eMBB andultra-reliable and low latency communication (URLLC) servicessimultaneously according to an embodiment of the disclosure;

FIG. 3 is a signal flow diagram illustrating a method for adaptivelyindicating presence/absence of partial puncturing of eMBB data accordingto an embodiment of the disclosure;

FIG. 4 is a signal flow diagram illustrating an indication informationconfiguration and transmission method according to an embodiment of thedisclosure;

FIG. 5 is a diagram illustrating a method for transmitting firstinterference impact information for the case where the eMBB and URLLCservices coexist according to an embodiment of the disclosure;

FIG. 6 is a diagram illustrating a method for transmitting secondinterference impact information for the case where the eMBB and URLLCservices coexist according to an embodiment of the disclosure;

FIG. 7 is a signal flow diagram illustrating an indication informationconfiguration and transmission method according to an embodiment of thedisclosure;

FIG. 8 is a diagram illustrating a method for transmitting firstinterference impact information for the case where the eMBB and URLLCservices coexist according to an embodiment of the disclosure;

FIG. 9 is a diagram illustrating a method for transmitting secondinterference impact information for the case where the eMBB and URLLCservices coexist according to another embodiment of the disclosure;

FIG. 10 is a block diagram illustrating a configuration of a terminalaccording to an embodiment of the disclosure; and

FIG. 11 is a block diagram illustrating a configuration of a basestation according to an embodiment of the disclosure.

Throughout the drawings, like reference numerals will be understood torefer to like parts, components, and structures.

DETAILED DESCRIPTION

The following description with reference to the accompanying drawings isprovided to assist in a comprehensive understanding of variousembodiments of the disclosure as defined by the claims and theirequivalents. It includes various specific details to assist in thatunderstanding, but these are to be regarded as merely exemplary.Accordingly, those of ordinary skill in the art will recognize thatvarious changes and modifications of the various embodiments describedherein can be made without departing from the scope and spirit of thedisclosure. In addition, descriptions of well-known functions andconstructions may be omitted for clarity and conciseness.

The terms and words used in the following description and claims are notlimited to the bibliographical meanings, but are merely used by theinventor to enable a clear and consistent understanding of thedisclosure. Accordingly, it should be apparent to those skilled in theart that the following description of various embodiments of thedisclosure is provided for illustration purposes only and not for thepurpose of limiting the disclosure as defined by the appended claims andtheir equivalents.

It is to be understood that the singular forms “a,” “an,” and “the”include plural referents unless the context clearly dictates otherwise.Thus, for example, reference to “a component surface” includes referenceto one or more of such surfaces.

Detailed descriptions of technical specifications well-known in the artand unrelated directly to the disclosure may be omitted to avoidobscuring the subject matter of the disclosure. This aims to omitunnecessary description so as to make clear the subject matter of thedisclosure.

When it is described that a part is “connected to” or “coupled to”another part, this may mean to include not only a case of “beingdirectly connected to” but also a case of “being indirectly connectedto” by interposing another device therebetween. It will be understoodthat the terms “comprises,” “comprising,” “includes,” and/or “including”used herein specify including the following elements but not excludingothers.

Although the components are depicted separately to indicate distinctivefeatures, this does not mean that the components are configured asindividual hardware or software units. The components are enumeratedseparately just for convenience of explanation, but at least two of thecomponents can be implemented as a single component or one component canbe divided into a plurality of components taking charge of correspondingfunctions. The embodiments of the integrated and divided components areincluded in the scope of the disclosure without departing from thespirit of the disclosure.

Although the components are depicted separately to indicate distinctivefeatures, this does not mean that the components are configured asindividual hardware or software units. The components are enumeratedseparately just for convenience of explanation, and at least two of thecomponents can be implemented as a single component or one component canbe divided into a plurality of components taking charge of correspondingfunctions. The embodiments of the integrated and divided components areincluded in the scope of the disclosure without departing from thespirit of the disclosure.

Some of the components may not be essential components for inevitablefunctions of the disclosure and may be optional components just forperformance enhancement. The disclosure can be implemented with only theessential components required for implementing the subject matter of thedisclosure with the exception of the optional components for performanceenhancement, and such a configuration with only the essential componentswith the exception of the optional components can be included in theclaims of the disclosure.

It will be understood that each block of the flowcharts and/or blockdiagrams, and combinations of blocks in the flowcharts and/or blockdiagrams, can be implemented by computer program instructions. Thesecomputer program instructions may be provided to a processor of ageneral-purpose computer, special purpose computer, or otherprogrammable data processing apparatus, such that the instructions thatare executed via the processor of the computer or other programmabledata processing apparatus create means for implementing thefunctions/acts specified in the flowcharts and/or block diagrams. Thesecomputer program instructions may also be stored in a non-transitorycomputer-readable memory that can direct a computer or otherprogrammable data processing apparatus to function in a particularmanner, such that the instructions stored in the non-transitorycomputer-readable memory produce articles of manufacture embeddinginstruction means that implement the function/act specified in theflowcharts and/or block diagrams. The computer program instructions mayalso be loaded onto a computer or other programmable data processingapparatus to cause a series of operational steps to be performed on thecomputer or other programmable apparatus to produce a computerimplemented process such that the instructions that are executed on thecomputer or other programmable apparatus provide steps for implementingthe functions/acts specified in the flowcharts and/or block diagrams.

According to various embodiments of the disclosure, the term “module”,means, but is not limited to, a software or hardware component, such asa field programmable gate array (FPGA) or application specificintegrated circuit (ASIC), which performs certain tasks. A module mayadvantageously be configured to reside on the addressable storage mediumand configured to be executed on one or more processors. Thus, a modulemay include, by way of example, components, such as software components,object-oriented software components, class components and taskcomponents, processes, functions, attributes, procedures, subroutines,segments of program code, drivers, firmware, microcode, circuitry, data,databases, data structures, tables, arrays, and variables. Thefunctionality provided for in the components and modules may be combinedinto fewer components and modules or further separated into additionalcomponents and modules. In addition, the components and modules may beimplemented such that they execute one or more CPUs in a device or asecure multimedia card.

Before undertaking the detailed description of the disclosure below, itmay be advantageous to make a brief description of a 5G or new radio(NR) wireless communication system. The 5G wireless communication systemoperates over broad frequency ranges in comparison with the legacy3^(rd) generation (3G) and 4th generation (4G or LTE/LTE-A) wirelesscommunication systems. Unlike the legacy 3G and 4G wirelesscommunication standards developed in consideration of backwardcompatibility, the 5G wireless communication standards consider forwardcompatibility. In accordance with the standardization policy, the 5Gwireless communication system specifies use cases of three servicecategories. The three service categories of the 5G wirelesscommunication system are as follows:

The first service category is enhanced mobile broadband (eMBB) service,the second service category is massive machine type communication (mMTC)service as a data communication service among things through wirelessconnections without any direct manipulation or involvement of a humanbeing for information acquisition and transmission anytime anywhere, andthe ultra-reliable low latency communication (URLLC) service.

In the following description, the enhanced data rate-based datacommunication service as the first service category may beinterchangeably referred to as “data communication,” “data communicationservice,” “eMBB,” “eMBB service,” and “eMBB communication service” withthe same meaning for convenience of explanation.

The massive IoT-based communication service as the second servicecategory may be interchangeably referred to as “IoT,” “IoT service,”“eMTC communication,” “eMTC communication service,” and “eMTC service”with the same meaning for convenience of explanation.

The IoT communication service based on the ultra-low latency andultra-reliability as the third service category may be interchangeablyreferred to as “ultra-low latency service,” “highly reliable service,”“ultra-low latency communication,” “highly reliable communication,”“ultra-low latency highly reliable IoT communication,” “ultra-lowlatency highly reliable IoT communication service,” “URLLC,” “URLLCcommunication,” “URLLC service,” and “URLLC communication service” withthe same meaning for convenience of explanation.

The URLLC needs to meet the requirements of ultra-reliability (e.g.,packet error rate 10⁻⁵) and low latency (e.g., about 0.5 msec) incomparison with other services. In order to meet the challengingrequirements, the URLLC service needs to use a transmission timeinterval (TTI) shorter than that for the eMBB service, and variousoperation methods are being considered for providing the URLLC service.

For example, it may be possible to consider a scenario in which the eMBBservice is scheduled based on the eMBB TTI and the URLLC service basedon a TTI shorter than the eMBB TTI. In this case, it may occur that thebase station (gNB, eNB, etc.) has to transmit a URLLC packet in themiddle of transmitting the eMBB service packets. In such a case, inorder to transmit the URLLC packet in the middle of transmitting eMBBservice packets, it may be necessary to allocate part of the resourcesreserved for the eMBB service to provide the URLLC service in the natureof the URLLC service instead of the eMBB service data. In the case ofallocating part of the resources reserved for the eMBB service toprovide the URLLC service, the terminal (user equipment (UE)) (e.g.,eMBB terminal) receiving the eMBB service may mis-recognize andmis-handle URLLC service data as eMBB service data. This may causesignificant data reception performance degradation of the terminal inview of receiving the eMBB service.

FIG. 1 is a diagram exemplifying resources for providing an eMBB serviceaccording to an embodiment of the disclosure, and FIG. 2 is a diagramexemplifying resources for providing eMBB and URLLC servicessimultaneously according to an embodiment of the disclosure.

A description is made of the resources for providing the eMBB and URLLCservices with reference to FIGS. 1 and 2.

FIG. 1 is a diagram for explaining a resource allocation unit forproviding the eMBB service in a wireless communication system, and FIG.2 is a diagram for explaining a situation where a resource regionreserved for the eMBB service is allocated for providing the URLLCservice.

Referring to FIG. 1, the horizontal axis denotes time resources, and thevertical axis denotes frequency resources. In the wireless communicationsystem, the resource allocation is performed in unit of frequency andtime resource. In the embodiment of FIG. 1, the unit of frequency isdefined by a predetermined frequency band or a predetermined number offrequency resources. The time resource may be allocated in the same formor different forms for the respective services in a 5G wirelesscommunication system. FIG. 1 exemplifies a case of allocating timeresources for the eMBB service. For the eMBB service, a time resourceallocation unit, namely TTI is a long TTI 100. The long TTI 100 beingallocated for the eMBB service may include a period 110 for transmittingeMBB control information (also interchangeably referred to as eMBBcontrol channel, eMBB control region, and eMBB control period) and aperiod 140 for transmitting eMBB service data (also interchangeablyreferred to as eMBB data channel, eMBB data period, and eMBB dataregion).

Referring to FIG. 2, a comparison is made between the eMBB and URLLCservice resources. As assumed above, it is assumed that that a frequencyresource unit is defined by a predetermined frequency band or apredetermined number of frequency resources. As described above, thelong TTI 100 is used as the resource allocation unit for the eMBBservice and may include the period 110 for transmitting the eMBB controlchannel conveying control information and the period 140 fortransmitting eMBB service data.

For the URLLC service, it may be possible to allocate resources in timeperiod units of a short TTI 120 instead of the long TTI 100. Accordingto an embodiment of the disclosure, a URLLC data transmission period ofthe long TTI 100 may include a time period unit corresponding to two ormore short TTIs 120. FIG. 2 exemplifies a case where data transmissionperiod 140 of the long TTI 100 includes three short TTIs 141, 142, and143. However, the data transmission period 140 of the long TTI 100 maybe configured to include more than or less than the three short TTIs141, 142, and 143 shown in FIG. 2.

The TTI 100 for eMBB may be, interchangeably and without distinction,referred to as eMBB TTI, long TTI, normal TTI, and first TTI to indicatethe TTI applied for the eMBB service. The TTI 120 for URLLC may be,interchangeably and without distinction, referred to as URLLC TTI, shortTTI, and second TTI to indicate the TTI applied for the URLLC service.

Hereinafter, the respective services are described on the basis of theexplanation made with reference to FIGS. 1 and 2. As described above,the wireless communication system may allocate resources in units ofeMBB TTI, i.e., long TTI 100, for providing a terminal with the eMBBservice. As described with reference to FIG. 1, an eMBB TTI 100 may becomposed of an eMBB control channel 110 for conveying the controlinformation and an eMBB data channel 140 for conveying eMBB servicedata. The base station may transmit the eMBB control channel 110including the control information for use by the terminal in receivingthe eMBB service data 140. Accordingly, the eMBB UE may receive the eMBBcontrol channel 110 and perform demodulation and decoding on the eMBBdata channel 140 based on the control information conveyed in the eMBBcontrol channel 110.

The URLLC data 131 is data requiring ultra-low latency and highreliability. Accordingly, if the URLLC data 131 occur in a burst manner,the base station has to transmit the URLLC data 131 immediately. In thisrespect, it is necessary to allocate resources in units of a very shortTTI 120 as exemplified in FIG. 2 and transmit to the terminal the URLLCdata 131 immediately upon its occurrence. Since the URLLC data 131should be transmitted at the short TTI 120, it may occur that all of theavailable frequency resources, e.g., frequency resources fortransmitting the URLLC data 131, are already allocated to otherterminals. In this case, it may be preferred for the URLLC service tohave a priority higher than that of the eMBB service. Accordingly, thebase station may allocate a portion of the resources reserved for theeMBB service as the resources for URLLC service to transmit the URLLCdata 131.

FIG. 2 exemplifies a case where part of the eMBB resource 100 allocatedto a certain terminal is re-allocated as the resource for transmittingthe URLLC data 131. In the case of using a part of the eMBB resource 100for transmitting the URLLC data 131, the eMBB data (eMBB packet) to betransmitted to the terminal may also be mapped to the eMBB data region140. Accordingly, a base station may puncture or remove the eMBB dataallocated a portion of the eMBB data region 140, and insert (allocate)the URLLC data (URLLC packet) 131 to be transmitted to the terminal tothe resource where the eMBB data has been punctured or removed andtransmit the URLLC data. In the case where the base station punctures orremoves the data mapped to part of the eMBB data region 140 and insertsthe URLLC data 131 to the corresponding resource where the eMBB data hasbeen punctured or removed, the eMBB terminal may receive other data aswell as the data destined for the terminal in the resource regionallocated to the terminal (i.e., the data received by the terminal mayinclude the URLLC data 131 destined for any other terminal as well asthe eMBB data destined for the terminal).

If the eMBB terminal receives the URLLC data 131 destined for any otherterminal during the long TTI 100 allocated to the eMBB terminal, theeMBB terminal performs demodulation and decoding on the data includingthe URLLC data 131 that is not destined to the eMBB terminal, resultingin a significant data reception error. In this case, the eMBB terminalmay request to the base station for retransmission of the unsuccessfullydemodulated and decoded data. In the case of using a hybrid automaticrepeat request (HARQ) scheme for combining the received data, theterminal is likely to perform decoding on the data that has already beendetermined as the wrong data (i.e., URLLC data 131 destined for anyother terminal) and thus request for retransmission more frequently thana normal case. As a consequence, the unintended retransmission requestscaused by the URLLC data 131 results in unnecessary power waste of theterminal as well as bandwidth waste.

In order to solve the above problems, it may be possible to consider amethod for the base station to transmit an indicator indicating whetherthe signal previously transmitted through the eMBB control channel 110includes a part conveying the URLLC data 131 and which part conveys theURLLC data 131 when the base station performs retransmission. The URLLCdata 131 part and position indicator may be the information indicatingwhether there is the puncturing region from which any puncturing hasbeen performed on the signal previously transmitted to the terminal andthe position where the puncturing has been made. The base station maysend the terminal a control signal including the information indicatingwhether there is any puncturing region in the previously transmittedsignal when performing the HARQ retransmission (after current eMBB TTI).Meanwhile, if the above indication information is transmitted during theeMBB TTI after the transmission of the URLLC data 131, i.e., HARQretransmission eMBB TTI, the corresponding indication information isreferred to as indication information conveyed in HARQ retransmissioneMBB TTI for convenience of explanation.

With this method, the terminal may puncture the URLLC data part 131 ofthe previously received signal based on information acquired from thecontrol channel 110 of the retransmitted signal, combine the processedsignal with the newly received signal, and perform demodulation anddecoding on the combined signal, thereby improving performance incomparison with the legacy method.

However, the initially transmitted eMBB signal impacted by the URLLCdata 131 is likely to be erroneous at the corresponding terminal; thus,the corresponding terminal needs to request the base station forretransmission. There is therefore a need of a method for improving thereception performance of the initially transmitted eMBB signal impactedby the URLLC data 131.

In order to accomplish this, in the case of providing the URLLC serviceusing a part of the resources allocated for the eMBB service as shown inFIG. 2, it may be necessary to transmit to the terminal an indicatorindicating the use of the eMBB resource for the URLLC service during thecurrent eMBB TTI carrying the URLLC data 131 in an explicit or implicitmanner in order for the eMBB terminal to recognize. In this case, theURLLC data 131 may occur after the transmission of the eMBB controlchannel 110; it is necessary to designate a part of eMBB datatransmission resource region 140 after the URLLC data 131 for indicationinformation transmission in a fixed or variable manner. For example, thebase station may use a part of the last data region 143 of the eMBB dataregion 140, in a fixed or variable manner, to indicate the transmissionof the URLLC data 131. If the indication information transmitted asabove is received, the terminal may perform demodulation and decoding onthe currently received signal with the exclusion of the URLLC data 131,resulting in considerable performance improvement in comparison with thelegacy method. Meanwhile, if the above indication information istransmitted during the eMBB TTI 100 carrying URLLC data 131, thecorresponding indication information is referred to as indicationinformation conveyed in impacted eMBB TTI for convenience ofexplanation.

According to an embodiment of the disclosure, the eNB may use both themethods for indicating whether there is a part of URLLC data 131 andwhich part carries the URLLC data 131 when performing HARQretransmission (after current eMBB TTI) and transmitting the indicationinformation during the eMBB TTI 100 conveying the URLLC data 131 in anexplicit or implicit manner.

However, if all base stations and terminals are forced to use one orboth of the two above described indication information transmissionmethods, this may cause significant restriction to the systemadministration. For example, a base station that is not burdened witheMBB retransmission along with the URLLC transmission may prefer to usethe method of transmitting the indication information through thecontrol channel in HARQ retransmission. As detection of the URLLCindication information in the current eMBB resource region may increasethe implementation complexity of the terminal, there may also be aterminal that prefers not to use this indication informationtransmission method. In a network in which the URLLC data occurfrequently, there may be a base station that does not want to have theburden of the eMBB retransmission along with the URLLC transmission, anda terminal with high capability may prefer not to use eMBBretransmission impacted by URLLC in order to increase communicationspeed.

The disclosure provides a method and apparatus for applying adaptively ascheme for a base station to transmit the information indicating URLLCresource allocation in performing HARQ retransmission and a scheme for abase station to transmit the information indicating allocation of URLLCresource in the current eMBB data resource when URLLC data occur. Themethod of transmitting the information indicating the URLLC resourceallocation in the current eMBB data resource region is referred to as afirst indication information transmission method, and the method oftransmitting the information indicating the URLLC resource allocation inperforming retransmission is referred to as a second indicationinformation transmission method.

Descriptions are made of the indication information configuration methodfor improving resource utilization efficiency based on the indicationinformation and the operation methods of the base station and terminalfor supporting the indication information configuration method in thecase both the two indication information transmission methods areapplied.

The interference occurring in the URLLC data 131 may be interchangeablyreferred to as URLLC interference, URLLC interference signal,interference impact signal, and URLLC interference impact signal forconvenience of explanation. The information on the presence of the URLLCdata when an interference caused by the URLLC data 131 occurs in theeMBB data 140 and the resource position of the URLLC data 131 may beinterchangeably referred to as URLLC resource allocation informationindication information, URLLC resource allocation indicationinformation, URLLC-related information, URLLC interferencesignal-related information, interference signal information,interference impact information, interference impact identificationinformation, and interference impact indication information.

<Adaptive Indication Information Transmission Method>

FIG. 3 is a signal flow diagram illustrating a method for adaptivelyindicating presence/absence of partial puncturing of eMBB data accordingto an embodiment of the disclosure.

Referring to FIG. 3, it may be possible to adaptively apply the methodfor a base station to transmit the interference impact information to aterminal during an eMBB TTI, impacted eMBB TTI, punctured eMBB TTI, orcurrent eMBB TTI carrying URLLC data and the method for the base stationto transmit the interference impact information to the terminal duringthe eMBB TTI (HARQ retransmission eMBB TTI, after-current eMBB TTI, orretransmission eMBB TTI) carrying the retransmission signal in responseto a retransmission request signal from the terminal.

In order to accomplish this, the base station may use a method oftransmitting the interference impact information based on terminalcapability (UE capability) (e.g., interference impact informationtransmission timing and/or granularity). According to an embodiment ofthe disclosure, the base station may adaptively use a method oftransmitting the interference impact information in consideration ofbase station capability (gNB capability) along with the terminalcapability.

The interference impact information transmission timing (indicationtiming) may indicate the timing for transmitting the interference impactinformation (URLLC resource allocation information). For example, theinterference impact information transmission timing (indication timing)may include at least one of the interference impact informationtransmission timing during the eMBB TTI (during current eMBB TTI)carrying the URLLC data 131, the interference impact informationtransmission timing during the HARQ retransmission eMBB TTI (aftercurrent eMBB TTI), and the interference impact information transmissiontiming during both the current eMBB TTI and HARQ retransmission TTI.

The term “granularity” denotes the degree or unit of precision forindicating the position of the URLLC data in the eMBB resource region bythe base station to the terminal.

In reference to FIGS. 1 and 2, the eMBB TTI 100 may be composed of aplurality of short TTIs 141, 142, and 143. The long TTI 100 may bereferred to as a slot and the short TTIs 141, 142, and 143 asmini-slots. The short TTIs 141, 142, and 143 may be sorted into at leastone group called a mini-slot group. Although FIG. 2 depicts threemini-slots 141, 142, and 143, the data region of the long TTI 100 may becomposed of 4 mini-slots. In this case, a first mini-slot group may becomposed of the first and second mini-slots, and a second mini-slotgroup may be composed of the third and fourth mini-slots. The mini-slotgroups may be composed of the same number of mini-slots or differentnumbers of mini-slots.

The base station may notify the terminal of the position of the URLLCdata in the eMBB resource region by mini-slot group. The base stationmay also notify the terminal of the position of the URLLC data in theeMBB resource region by mini-slot. The base station may also notify theterminal of the position of the URLLC data in the eMBB resource regionby code block (CB) or transport block (TB). In this case, thegranularity may indicate at least one of a mini-slot, mini-slot group,CB, and TB (or physical resource block (PRB)).

According to an embodiment of the disclosure it may be possible toconsider whether the terminal has a blind detection capability indetermining the interference impact information transmission method.Determining whether the terminal has a blind detection capability may bedetermining whether the terminal can blindly detect the interferenceimpact information. If the terminal has the blind detection capability,the base station may transmit to the terminal brief informationindicating presence/absence of URLLC data and, if present, the positionof the URLLC data for use by the terminal in performing blind detectionin an implicit and/or explicit manner such that the terminal detects thedetailed URLLC-related information based on the brief information. Ifthe terminal supports blind detection, the base station may transmitschematic URLLC-related information to the terminal so as to reduceconsiderably the resources for transmitting the indication information.In the opposite case where the terminal does not support blinddetection, the base station may explicitly transmit to the terminal thedetailed URLLC-related information on the presence/absence of the URLLCdata in the eMBB resource region and, if present, the position of theURLLC data. According to an embodiment of the disclosure, if theterminal supports blind detection, the base station may transmit theURLLC-related information to the terminal implicitly or explicitly.

According to an embodiment of the disclosure, the interference impactinformation position in a resource region may be determined per terminal(UE-specific). For example, the interference impact information for afirst terminal may be located in a first resource region, and theinterference impact information for a second terminal may be located ina second resource region. According to an embodiment of the disclosure,the interference impact information position in a resource region may bedetermined per base station (cell-specific). For example, theinterference impact information to be transmitted by a first basestation may be located in a first resource region, and the interferenceimpact information to be transmitted by a second base station may belocated in a second resource region.

A description is made of the detailed procedure. In reference to FIG. 3,the base station 320 may request to the terminal 310 for Terminalcapability information at operation 350.

The terminal 310 may send Terminal capability information to the basestation 320 at operation 360. The Terminal capability information mayinclude information on the interference impact information transmissiontiming of the terminal 310.

According to an embodiment of the disclosure, the Terminal capabilityinformation may include information indicating whether the terminal 310is capable of detecting interference impact information during the eMBBTTI carrying the URLLC data. According to an embodiment of thedisclosure, the Terminal capability information may include informationindicating whether the terminal 310 is capable of detecting interferenceimpact information in the eMBB TTI carrying a retransmission signal(HARQ retransmission eMBB TTI). According to an embodiment of thedisclosure, the Terminal capability information may include informationindicating whether the terminal 310 supports blind detection. Forexample, the Terminal capability information may include the informationindicating whether the terminal is capable of detecting explicit and/orimplicit interference impact information in the eMBB TTI carrying theURLLC data. The Terminal capability information may also include theinformation indicating whether the terminal 310 is capable of detectingexplicit and/or implicit interference impact information during the eMBBTTI carrying the retransmission signal.

At operation 370, the base station 320 may determine the transmissiontiming and/or granularity of the puncturing information in considerationof the capabilities of the base station 320 and the terminal 310. Thebase station 320 may send the terminal 310 the information on thedetermined interference impact information transmission method. Theterminal 310 may operate based on the received information.

According to an embodiment of the disclosure, the terminal capabilityinformation may include information on the terminal-preferredinterference impact information transmission timing. For example, if theterminal 310 is capable of detecting the interference impact informationduring the eMBB TTI carrying the URLLC data (impacted eMBB TTI) orduring the eMBB TTI carrying the retransmission signal (HARQretransmission eMBB TTI), the terminal 310 may notify the base station320 of its preferred interference impact information transmissiontiming. In this case, the base station 320 may determine theinterference impact information transmission timing based on theterminal-preferred interference impact information transmission timinginformation. If the base station 320 determines that theterminal-preferred interference impact information transmission timingis not appropriate, the base station 320 may ignore theterminal-preferred interference impact information transmission timinginformation, determine a more appropriate transmission timing, andnotify the terminal 310 of the determined transmission timing.

According to an embodiment of the disclosure, the terminal capabilityinformation may include information on a terminal-preferred granularity.For example, if the terminal 310 has a high blind detection capability,the terminal 310 may prefer the method of indicating the URLLC positionby mini-slot group. The terminal 310 may notify the base station 320that the terminal-preferred granularity is mini-slot group. In thiscase, the base station 320 may determine the granularity based on theterminal-preferred granularity information. If the base station 320determines that the terminal-preferred granularity is not appropriate,the base station 320 may ignore the terminal-preferred granularityinformation, determine a more appropriate granularity, and notify theterminal 310 of the determined granularity.

Operation 360 is described in more detail.

At operation 360, the terminal capability (UE capability) informationtransmitted from the terminal 310 to the base station 320 may furtherinclude new information. This new information may include information onthe interference impact information transmission timing supported by theterminal 310 and information indicating whether the terminal is capableof blindly detecting the interference impact information.

The new information may include 3-bit information.

The first bit (Pt bit) may indicate whether the terminal 310 is capableof detecting an indicator of interference impact information (puncturinginformation) during the current eMBB TTI and the indicator may be 1 bitunit. For example, the first bit may be set to 1 for the case where theterminal 310 is capable of detecting the indicator during the currenteMBB TTI and 0 for the opposite case, or vice versa.

The second bit (2^(nd) bit) may indicate whether the terminal 310 iscapable of detecting an indicator of interfere impact information(puncturing information) after the current eMBB TTI the indicator may be1 bit unit. For example, the second bit may be set to 1 for the casewhere the terminal 310 is capable of detecting the indicator aftercurrent the eMBB TTI and 0 for the opposite case , or vice versa.

The third bit (3^(rd) bit) may indicate whether the terminal 310 iscapable of blindly detecting interference impact information. Forexample, the third bit may be set to 1 for the case where the terminal310 is capable of blindly detecting interference impact informationduring current eMBB TTI and 0 for the opposite case , or vice versa.

For example, if the three bits of the information are “111,” this mayindicate that the terminal 310 is capable of detecting interferenceimpact information indication information during the current eMBB TTI(first bit=1), capable of detecting interference impact informationindication information after the current eMBB TTI (second bit=1), andcapable of blindly detecting interference impact information during thecurrent eMBB TTI (third bit=1). If the three bits of the information are“110,” this may indicate that the terminal 310 is capable of detectinginterference impact information indication information during thecurrent eMBB TTI (first bit=1), capable of detecting interference impactinformation indication information after the current eMBB TTI (secondbit=1), and incapable of blindly detecting interference impactinformation during the current eMBB TTI (third bit=0).

Operation 370 is described in more detail hereinafter.

The base station 320 may determine the transmission timing andgranularity of the interference impact information (puncturinginformation) to be actually used in consideration of the capabilities ofthe eNB 320 and the terminal 310. The base station 320 may determine theinterference impact information transmission timing and granularity tobe actually used in consideration of the information on the interferenceimpact information transmission timing supported by the terminal 310,the information on whether the terminal 310 is capable of blindlydetecting the interference impact information, and the information onthe granularity preferred by the terminal 310 that are included in theterminal capability (UE capability) information received from theterminal 310. The base station 320 may determine the interference impactinformation transmission timing and granularity to be actually used infurther consideration of the interference impact informationtransmission timing and granularity it can support.

For example, the interference impact information transmission timingsupportable by the base station 320 may be during current eMBB TTI,after current eMBB TTI, and both of the during current eMBB TTI and theafter current eMBB TTI, the granularity supportable by the base station320 may be one of mini-slot, mini-slot group, CB, and PRB (TB).

The base station 320 may determine the interference impact informationtransmission timing and granularity to be actually used in considerationof the interference impact information transmission timing supportableby the terminal 310 and the information on whether the terminal iscapable of blindly detecting the interference impact information.

For example, the base station 320 may receive, at operation 360, fromthe terminal 310, the information indicating that the terminal 310 iscapable of detecting the interference impact information indicationinformation during current eMBB TTI, capable of detecting theinterference impact information indication information after currenteMBB TTI, and capable of blind detection of the interference impactinformation during the current eMBB TTI. The terminal capabilityinformation may include the new information set to “111.” In this case,the base station 320 may determine the interference impact informationtransmission timing available both during and after the current eMBBTTI. The base station 320 may also determine the granularity ofmini-slot group for use during the current eMBB TTI. The terminal 310 iscapable of detecting the position of the URLLC data, even when the basestation 320 notifies the terminal 310 of the position of the URLLC databy mini-slot group as a large region during the current eMBB TTI becausethe terminal 310 supports blind decoding during the current eMBB TTI.The base station 320 may also determine the granularity of mini-slot (orPRB) for use after the current eMBB TTI. This aims to notify theterminal 310 of the accurate position of the URLLC data in order for theterminal 310 to perform eMBB data signal demodulation and decoding moreaccurately in the case of receiving a retransmission signal. Accordingto an embodiment of the disclosure, the base station 320 may alsodetermine the granularity of mini-slot, CB, or PRB instead of mini-slotgroup for use during the current eMBB TTI and mini-slot group or CB foruse after the current eMBB TTI. According to an embodiment of thedisclosure, the base station 320 may determine the interference impactinformation transmission timing during and/or after the current eMBB TTIin consideration of additional information such as communication channelquality.

At operation 360, the base station 320 may receive, from the terminal310, information indicating that the terminal 310 is capable ofdetecting the interference impact information indication informationboth during and after the current eMBB TTI and incapable of blindlydetecting the interference impact information during the current eMBBTTI. For example, the terminal capability information may include thenew information set to “110.” In this case, the base station 320 maydetermine the interference impact information transmission timingavailable both during and after the current eMBB TTI. According to anembodiment of the disclosure, the base station 320 may determine theinterference impact information transmission timing available bothduring and after the current eMBB TTI in consideration of additionalinformation such as communication channel quality. The base station 320may determine the granularity of mini-slot (or PRB) during the currenteMBB TTI. This aims to notify the terminal 310 of the accurate positionof the URLLC data to perform eMBB data signal demodulation and decodingmore accurately even during the current eMBB TTI because the terminal310 supports blind decoding during the current eMBB TTI. The basestation 320 may also determine the granularity of mini-slot (or PRB) foruse after the current eMBB TTI. According to an embodiment of thedisclosure, the base station 320 may also determine the granularity ofmini-slot group or CB both during and after the current eMBB TTI.

At operation 360, the base station 320 may receive from the terminal 310the information indicating that the terminal 310 is capable of detectingthe interference impact information indication information and blindlydetecting the interference impact information during the current eMBBTTI and is incapable of detecting the interference impact informationindication information after the current eMBB TTI. For example, theterminal capability information may include the new information set to“101.” In this case, the base station 320 may determine the interferenceimpact information transmission timing available during the current eMBBTTI. This is because the terminal 310 cannot receive the interferenceimpact information after the current eMBB TTI. The base station 320 mayalso determine the granularity of mini-slot group for use during thecurrent eMBB TTI. The terminal 310 is capable of detecting the positionof the URLLC data even when the base station 320 notifies the terminal310 of the position of the URLLC with the granularity of mini-slot groupas a large region during the current eMBB TTI because the terminal 310supports blind decoding. The base station 320 may determine thegranularity of mini-slot, CB, or PRB for use by the terminal 310 todetect the position of the URLLC data more accurately. This aims to makeit possible for the base station 320 to notify the terminal 310 of theposition of the URLLC data more accurately at a time because theterminal 310 cannot receive the interference impact information afterthe current eMBB TTI.

At operation 360, the base station 320 may receive from the terminal 310the information indicating that the terminal 310 is capable of detectingthe interference impact information indication information during thecurrent eMBB TTI and is incapable of detecting the interference impactinformation indication information after the current eMBB TTI and ofblindly detecting the interference impact information during the currenteMBB TTI. For example, the terminal capability information may includethe new information set to “100.” In this case, the base station 320 maydetermine the interference impact information transmission timingavailable during the current eMBB TTI. This is because the terminal 310cannot receive the interference impact information after the currenteMBB TTI. The base station 320 may also determine the granularity ofmini-slot (or PRB) for use during the current eMBB TTI. This aims tonotify the terminal 310 of the accurate position of the URLLC data inorder for the terminal 310 to perform eMBB data signal demodulation anddecoding more accurately during the current eMBB TTI because theterminal 310 does not support blind detection during the current eMBBTTI. According to an embodiment of the disclosure, the base station 320is capable of determining the granularity of mini-slot group or CB foruse during the current eMBB TTI.

At operation 360, the base station 320 may receive from the terminal 310the information indicating that the terminal 310 is incapable ofdetecting the interference impact information indication informationduring the current eMBB TTI and is capable of detecting the interferenceimpact information indication information after the current eMBB TTI andblindly detecting the interference impact information during the currenteMBB TTI. For example, the terminal capability information may includethe new information set to “011.” In this case, the base station 320 maydetermine the interference impact information transmission timingavailable after the current eMBB TTI. This is because the terminal 310cannot receive the interference impact information during the currenteMBB TTI. The base station 320 may also determine the granularity ofmini-slot (or PRB) for use after the current eMBB TTI. This aims to makeit possible for the base station 320 to notify the terminal 310 of theposition of the URLLC data accurately at a time because the terminal 310cannot receive the interference impact information during the currenteMBB TTI. According to an embodiment of the disclosure, the base station320 is capable of determining the granularity of mini-slot group or CBfor use after the current eMBB TTI.

At operation 360, the base station may receive from the terminal 310 theinformation indicating that the terminal 310 is incapable of detectingthe interference impact information indication information and blindlydetecting the interference impact information during the current eMBBTTI and is capable of detecting the interference impact informationindication information after the current eMBB TTI. For example, theterminal capability information may include the new information set to“010.” In this case, the base station 320 may determine the interferenceimpact information transmission timing available after the current eMBBTTI. This is because the terminal 310 cannot receive the interferenceimpact information during the current eMBB TTI. The base station 320 mayalso determine the granularity of mini-slot (or PRB) for use after thecurrent eMBB TTI. This aims to make it possible for the base station 320to notify the terminal 310 of the position of the URLLC data accuratelyat a time because the terminal 310 cannot receive the interferenceimpact information during the current eMBB TTI. According to anembodiment of the disclosure, the base station 320 is capable ofdetermining the granularity of mini-slot group or CB available after thecurrent eMBB TTI.

At operation 360, the base station 320 may receive from the terminal 310the information indicating that the terminal 310 is incapable ofdetecting the interference impact information indication informationboth during and after the current eMBB TTI and is capable of blindlydetecting the interference impact during the current eMBB TTI. Forexample, the terminal capability information may include the newinformation set to “001.” In this case, the base station 320 maydetermine the interference impact information transmission timingavailable after the current eMBB TTI. The base station 320 may alsodetermine the granularity of the TB-unit NDI (new data indicator)available after the current eMBB TTI. Although the terminal 310 cannotreceive the interference impact information both during and after thecurrent eMBB TTI, the base station 320 may use the granularity of theTB-unit NDI to transmit the interference impact information to theterminal 310 after the current eMBB TTI.

At operation 360, the base station 320 may receive from the terminal 310the information indicating that the terminal 310 is incapable ofdetecting the interference impact information indication informationboth during and after the current eMBB TTI and blindly detecting theinterference impact information during the current eMBB TTI. Forexample, the terminal capability information may include the newinformation set to “000.” In this case, the base station 320 maydetermine the interference impact information transmission timingavailable after the current eMBB TTI. Although the terminal cannotreceive the interference impact information both during and after thecurrent eMBB TTI, the base station 320 may transmit the interferenceimpact information to the terminal 310 after the current eMBB TTI usingthe TB-unit NDI.

According to another embodiment of the disclosure, the interferenceimpact information transmission timing supportable by the base station320 may be determined for use during the current eMBB TTI, and thegranularity supportable by the base station 320 may be determined asmini-slot, mini-slot group, CB, or PRB (TB).

The base station 320 may determine the interference impact informationtransmission timing and granularity to be actually used in considerationof the interference impact information transmission timing supportableby the terminal 310 and the information on whether the terminal 310 iscapable of blindly detecting the interference impact information.

For example, at operation 360, the base station 320 may receive from theterminal 310 the information indicating that the terminal 310 is capableof detecting the interference impact information indication informationboth during and after the current eMBB TTI and blindly detecting theinterference impact information during the current eMBB TTI. Forexample, the terminal capability information may include the newinformation set to “111.” In this case, the base station 320 maydetermine the interference impact information transmission timingavailable during the current eMBB TTI. This is because the base station320 cannot transmit the interference impact information after thecurrent eMBB TTI even though the terminal 310 is capable of receivingthe interference impact information both during and after the currenteMBB TTI. The base station 320 may also determine the granularity ofmini-slot group for use during the current eMBB TTI. The terminal 310 iscapable of detecting the position of the URLLC data even though the basestation 320 notifies the terminal 310 of the position of the URLLC databy mini-slot group as a large region during the current eMBB TTI becausethe terminal 310 supports blind decoding during the current eMBB TTI.The base station 320 may also determine the granularity of mini-slot,CB, or PRB available in order for the terminal 310 to locate theposition of the URLLC data more accurately. This aims to make itpossible for the base station 320 to notify the terminal 310 of theposition of the URLLC data more accurately at a time because the basestation 320 cannot transmit the interference impact information afterthe current eMBB TTI.

At operation 360, the base station 320 may receive from the terminal 310the information indicating that the terminal is capable of detecting theinterference impact information indication information both during andafter the current eMBB and is incapable of blindly detecting theinference impact information during the current eMBB TTI. For example,the terminal capability information may include the new information setto “110.” In this case, the base station 320 may determine theinterference impact information transmission timing available during thecurrent eMBB TTI. This is because the base station 320 cannot transmitthe interference impact information after the current eMBB TTI eventhough the terminal 310 is capable of receiving the interference impactinformation both during and after the current eMBB TTI. The base station320 may also determine the granularity of mini-slot (or PRB) for useduring the current eMBB TTI. This aims to notify the terminal 310 of theaccurate position of the URLLC data because the terminal 310 does notsupport blind detection during the current eMBB TTI. According to anembodiment of the disclosure, the base station 320 may determine thegranularity of mini-slot group or CB for use during the current eMBBTTI.

At operation 360, the base station 320 may receive from the terminal 310the information indicating that the terminal 310 is capable of detectingthe interference impact information indication information and blindlydetecting the interference impact information during the current eMBBTTI and is incapable of detecting the interference impact informationindication information after the current eMBB TTI. For example, theterminal capability information may include the new information set to“101.” In this case, the base station 320 may determine the interferenceimpact information transmission timing available during the current eMBBTTI. This is because the terminal 310 cannot receive the interferenceimpact information after the current eMBB TTI and the base station 320cannot transmit the interference impact information after the currenteMBB TTI. The base station 320 may also determine the granularity ofmini-slot group for use during the current eMBB TTI. The terminal 310 iscapable of detecting the position of the URLLC data even though the basestation 320 notifies the terminal 310 of the position of the URLLC datawith the granularity of mini-slot group as a large region during thecurrent eMBB TTI because the terminal 310 supports blind decoding. Thebase station 320 may determine the granularity of mini-slot, CB, or PRBfor use by the terminal 310 to detect the position of the URLLC datamore accurately. This aims to make it possible for the base station 320to notify the terminal 310 of the position of the URLLC data moreaccurately at a time because the terminal 310 cannot receive theinterference impact information after the current eMBB TTI.

At operation 360, the base station 320 may receive from the terminal 310the information indicating that the terminal 310 is capable of detectingthe interference impact information indication information during thecurrent eMBB TTI and is incapable of detecting the interference impactinformation indication information after the current eMBB TTI and ofblindly detecting the interference impact information during the currenteMBB TTI. For example, the terminal capability information may includethe new information set to “100.” In this case, the base station 320 maydetermine the interference impact information transmission timingavailable during the current eMBB TTI. This is because the terminal 310cannot receive the interference impact information after the currenteMBB TTI and the base station 320 cannot transmit the interferenceimpact information after the current eMBB TTI. The base station 320 mayalso determine the granularity of mini-slot (or PRB) for use during thecurrent eMBB TTI. This aims to notify the terminal 310 of the accurateposition of the URLLC data in order for the terminal 310 to perform eMBBdata signal demodulation and decoding more accurately during the currenteMBB TTI because the terminal 310 does not support blind detectionduring the current eMBB TTI. According to an embodiment of thedisclosure, the base station 320 is capable of determining thegranularity of mini-slot group or CB for use during the current eMBBTTI.

At operation 360, the base station 320 may receive from the terminal 310the information indicating that the terminal 310 is incapable ofdetecting the interference impact information indication informationduring the current eMBB TTI and is capable of detecting the interferenceimpact information indication information after the current eMBB TTI andblindly detecting the interference impact information during the currenteMBB TTI. For example, the terminal capability information may includethe new information set to “011.” In this case, the base station 320 maydetermine the interference impact information transmission timingavailable after the current eMBB TTI. The base station 320 may alsodetermine the granularity of the TB-unit NDI to be used. The basestation 320 may use the TB-unit NDI to transmit the interference impactinformation to the terminal 310 after the current eMBB TTI because theterminal 310 cannot receive the interference impact information duringthe current eMBB TTI and the base station cannot transmit theinterference impact information after the current eMBB TTI.

At operation 360, the base station may receive from the terminal 310 theinformation indicating that the terminal 310 is incapable of detectingthe interference impact information indication information and ofblindly detecting the interference impact information during the currenteMBB TTI and is capable of detecting the interference impact informationindication information after the current eMBB TTI. For example, theterminal capability information may include the new information set to“010.” In this case, the base station may determine the interferenceimpact information transmission timing available after the current eMBBTTI. The base station 320 may also determine the granularity of theTB-unit NDI to be used. The base station 320 may use the TB-unit NDI totransmit the interference impact information to the terminal 310 afterthe current eMBB TTI because the terminal 310 cannot receive theinterference impact information during the current eMBB TTI and the basestation cannot transmit the interference impact information after thecurrent eMBB TTI.

At operation 360, the base station 320 may receive from the terminal 310the information indicating that the terminal 310 is incapable ofdetecting the interference impact information indication informationboth during and after the current eMBB TTI and is capable of blindlydetecting the interference impact during the current eMBB TTI. Forexample, the terminal capability information may include the newinformation set to “001.” In this case, the base station 320 maydetermine the interference impact information transmission timingavailable after the current eMBB TTI. The base station 320 may alsodetermine the granularity of the TB-unit NDI. The base station 320 mayuse the TB-unit NDI to transmit the interference impact information tothe terminal 310 after the current eMBB TTI because the terminal 310cannot receive the interference impact information both during and afterthe current eMBB TTI and the base station cannot transmit theinterference impact information after the current eMBB TTI.

At operation 360, the base station 320 may receive from the terminal 310the information indicating that the terminal 310 is incapable ofdetecting the interference impact information indication informationboth during and after the current eMBB TTI and of blindly detecting theinterference impact information during the current eMBB TTI. Forexample, the terminal capability information may include the newinformation set to “000.” In this case, the base station 320 maydetermine the interference impact information transmission timingavailable after the current eMBB TTI. The base station 320 may alsodetermine the granularity of the TB-unit NDI. The base station 320 mayuse the TB-unit NDI to transmit the interference impact information tothe terminal 310 after the current eMBB TTI because the terminal 310cannot receive the interference impact information both during and afterthe current eMBB TTI and the base station cannot transmit theinterference impact information after the current eMBB TTI.

According to another embodiment of the disclosure, the interferenceimpact information transmission timing supportable by the base station320 may be determined for use after the current eMBB TTI, and thegranularity supportable by the base station 320 may be determined asmini-slot, mini-slot group, CB, or PRB (TB).

The base station 320 may determine the interference impact informationtransmission timing and granularity to be actually used in considerationof the interference impact information transmission timing supportableby the terminal 310 and the information on whether the terminal 310 iscapable of blindly detecting the interference impact information.

For example, at operation 360, the base station 320 may receive from theterminal 310 the information indicating that the terminal 310 is capableof detecting the interference impact information indication informationboth during and after the current eMBB TTI and blindly detecting theinterference impact information during the current eMBB TTI. Forexample, the terminal capability information may include the newinformation set to “111.” In this case, the base station 320 maydetermine the interference impact information transmission timingavailable after the current eMBB TTI. This is because the base station320 cannot transmit the interference impact information during thecurrent eMBB TTI even though the terminal 310 is capable of receivingthe interference impact information both during and after the currenteMBB TTI. The base station 320 may also determine the granularity ofmini-slot group for use after the current eMBB TTI. The base station 320may also determine the granularity of mini-slot, CB, or PRB for useafter current eMBB TTI in order for the terminal 310 to locate theposition of the URLLC data more accurately. This aims to make itpossible for the base station 320 to notify the terminal 310 of theposition of the URLLC data more accurately at a time because the basestation 320 cannot transmit the interference impact information duringcurrent eMBB TTI.

At operation 360, the base station 320 may receive from the terminal 310the information indicating that the terminal is capable of detecting theinterference impact information indication information both during andafter the current eMBB and is incapable of blindly detecting theinference impact information during the current eMBB TTI. For example,the terminal capability information may include the new information setto “110.” In this case, the base station 320 may determine theinterference impact information transmission timing available after thecurrent eMBB TTI. This is because the base station 320 cannot transmitthe interference impact information during the current eMBB TTI eventhough the terminal 310 is capable of receiving the interference impactinformation both during and after the current eMBB TTI. The base station320 may also determine the granularity of mini-slot group for use duringthe current eMBB TTI. The base station 320 may also determine thegranularity of mini-slot, CB, or PRB for use during current eMBB inorder for the terminal 310 to locate the position of the URLLC data moreaccurately. This aims to make it possible to notify the terminal 310 ofthe accurate position of the URLLC data at a time because the basestation 320 cannot transmit the interference impact information duringthe current eMBB TTI.

At operation 360, the base station 320 may receive from the terminal 310the information indicating that the terminal 310 is capable of detectingthe interference impact information indication information and blindlydetecting the interference impact information during the current eMBBTTI and is incapable of detecting the interference impact informationindication information after the current eMBB TTI. For example, theterminal capability information may include the new information set to“101.” In this case, the base station 320 may determine the interferenceimpact information transmission timing available after the current eMBBTTI. The base station 320 may also determine the granularity of theTB-unit NDI to be used. The base station 320 may use the TB-unit NDI totransmit the interference impact information to the terminal 310 afterthe current eMBB TTI because the terminal 310 can receive theinterference impact information during, but not after, the current eMBBTTI, and the base station cannot transmit the interference impactinformation during the current eMBB TTI.

At operation 360, the base station 320 may receive from the terminal 310the information indicating that the terminal 310 is capable of detectingthe interference impact information indication information during thecurrent eMBB TTI and is incapable of detecting the interference impactinformation indication information after the current eMBB TTI and ofblindly detecting the interference impact information during the currenteMBB TTI. For example, the terminal capability information may includethe new information set to “100.” In this case, the base station 320 maydetermine the interference impact information transmission timingavailable after the current eMBB TTI. The base station 320 may alsodetermine the granularity of the TB-based based NDI to be used. The basestation 320 may use the TB-unit NDI to transmit the interference impactinformation to the terminal 310 after the current eMBB TTI because theterminal 310 can receive the interference impact information during, butnot after, the current eMBB TTI, and the base station cannot transmitthe interference impact information during the current eMBB TTI.

At operation 360, the base station 320 may receive from the terminal 310the information indicating that the terminal 310 is incapable ofdetecting the interference impact information indication informationduring the current eMBB TTI and is capable of detecting the interferenceimpact information indication information after the current eMBB TTI andblindly detecting the interference impact information during the currenteMBB TTI. For example, the terminal capability information may includethe new information set to “011.” In this case, the base station 320 maydetermine the interference impact information transmission timingavailable after the current eMBB TTI. This is because the terminal 310can receive the interference impact information after the current eMBBTTI and the base station 320 cannot transmit the interference impactinformation during the current eMBB TTI. The base station 320 may alsodetermine the granularity of mini-slot group for use after the currenteMBB TTI. The base station 320 may also determine the granularity ofmini-slot, CB, or PRB for use after current eMBB in order for theterminal 310 to locate the position of the URLLC data more accurately.This aims to make it possible for the base station 320 to notify theterminal 310 of the position of the URLLC data accurately at a timebecause the base station 320 cannot transmit the interference impactinformation during the current eMBB TTI.

At operation 360, the base station may receive from the terminal 310 theinformation indicating that the terminal 310 is incapable of detectingthe interference impact information indication information and blindlydetecting the interference impact information during the current eMBBTTI and is capable of detecting the interference impact informationindication information after the current eMBB TTI. For example, theterminal capability information may include the new information set to“010.” In this case, the base station 320 may determine the interferenceimpact information transmission timing available after the current eMBBTTI. This is because the terminal is capable of receiving theinterference impact information after the current eMBB TTI while thebase station 320 cannot transmit the interference impact informationduring the current eMBB TTI. The base station 320 may also determine thegranularity of mini-slot group for use after the current eMBB TTI. Thebase station 320 may also determine the granularity of mini-slot, CB, orPRB for use after current eMBB TTI in order for the terminal 310 tolocate the position of the URLLC data more accurately. This aims to makeit possible for the base station 320 to notify the terminal 310 of theposition of the URLLC data accurately at a time because the base station320 cannot transmit the interference impact information during thecurrent eMBB TTI.

At operation 360, the base station 320 may receive from the terminal 310the information indicating that the terminal 310 is incapable ofdetecting the interference impact information indication informationboth during and after the current eMBB TTI and is capable of blindlydetecting the interference impact information during the current eMBBTTI. For example, the terminal capability information may include thenew information set to “001.” In this case, the base station 320 maydetermine the interference impact information transmission timingavailable after the current eMBB TTI. The base station 320 may alsodetermine the granularity of the TB-unit NDI to be used. The basestation 320 may use the TB-unit NDI to transmit the interference impactinformation after the current eMBB TTI because the base station 320cannot transmit the interference impact information during the currenteMBB TTI even though the terminal 310 can receive the interferenceimpact information both during and after the current eMBB TTI.

At operation 360, the base station 320 may receive from the terminal 310the information indicating that the terminal 310 is incapable ofdetecting the interference impact information indication informationboth during and after the current eMBB TTI and blindly detecting theinterference impact information during the current eMBB TTI. Forexample, the terminal capability information may include the newinformation set to “000.” In this case, the base station 320 maydetermine the interference impact information transmission timingavailable after the current eMBB TTI. The base station 320 may determinethe granularity of the TB-unit NDI to be used. That is, the base station320 may use the TB-unit NDI to transmit the interference impactinformation to the terminal after the current eMBB TTI because the basestation 320 cannot transmit the interference impact information duringthe current eMBB TTI even though the terminal 310 can receive theinterference impact information both during and after the current eMBBTTI.

As described above, the base station 320 may determine the interferenceimpact information transmission timing and granularity information basedon the terminal capability received from the terminal 310 and the basestation capability and then transmit the interference impact informationtransmission timing and granularity information to the terminal 310. Theterminal 320 may operate based on the received information.

The base station 320 may transmit the above-described information to theterminal 310 using downlink control information (DCI) or a radioresource control (RRC) message.

The signal transmitted from the base station 320 to the terminal 310 maybe exemplified as shown in Table 1, but it is not limited thereto. Theindication information may 4 bit information.

TABLE 1 Transmission Granularity information Timing During After 1100Both Mini-slot group Mini-slot 1101 Mini-slot & PRB 1110 Mini-slotMini-slot 1111 Mini-slot & PRB 0100 After — Mini-slot 0101 — Mini-slot &PRB 0111 — TB-unit DNI 1011 During Mini-slot group — 1000 Mini-slot —1001 Mini-slot & PRB —

Table 1 exemplifies the case where the base station 320 is capable oftransmitting the interference impact information transmission timingduring and/or after the current eMBB TTI. For example, the base station320 may transmit to the terminal 310 the signal “1100” indicating thatthe interference impact information transmitting timing is availableboth during and after the current eMBB TTI and the granularity is themini-slot group for use during the eMBB TTI and the mini-slot for useafter the eMBB TTI.

The bitwidth for the indication information may be reduced according tothe granularity. For example, if the mini-slot (& PRB) is not supported,the indication information may be expressed with 3 bits. If the basestation 320 supports the interference impact information transmissiontiming available only during the current eMBB TTI, the indicationinformation may be expressed with 2 bits. In this case, the indicationinformation may be exemplified as shown in Table 2.

TABLE 2 Transmission Granularity information Timing During After 00After TB-unit NDI 01 During Mini-slot group 10 Mini-slot 11 Mini-slot &PRB

<Indication Information Configuration Method and Base Station/TerminalOperation Method >

A description is made of a method for reducing interference impactinformation transmission overhead (indication overhead) bysimultaneously optimizing two interference impact informationtransmission schemes: scheme for transmitting the interference impactinformation during the eMBB TTI carrying URLLC data (punctured eMBB TTI,current eMBB TTI, impacted eMBB TTI) and scheme for transmitting theinterference impact information during the eMBB TTI carrying aretransmission signal (HARQ retransmission eMBB TTI, after current eMBBTTI, retransmission eMBB TTI). The interference impact information beingtransmitted during the eMBB TTI carrying URLLC data is referred to as afirst interference impact information, and the interference impactinformation being transmitted during the eMBB TTI carrying aretransmission signal is referred to as a second interference impactinformation.

A description is made of the first interference impact information in apunctured eMBB TTI (in consideration of the second interference impactinformation after current eMBB TTI). A description is made of theinformation to be fed back to the base station 320 in a situation ofNACK after the terminal performs decoding based on the firstinterference impact information. A description is made of the secondinterference impact information being transmitted by the base station320 after current eMBB TTI (in consideration of the first interferenceinformation during the punctured eMBB TTI).

FIG. 4 is a signal flow diagram illustrating an indication informationconfiguration and transmission method according to an embodiment of thedisclosure, FIG. 5 is a diagram illustrating a method for transmittingfirst interference impact information for the case where the eMBB andURLLC services coexist according to an embodiment of the disclosure, andFIG. 6 is a diagram illustrating a method for transmitting secondinterference impact information for the case where the eMBB and URLLCservices coexist according to an embodiment of the disclosure.

Referring to FIGS. 4 to 6, the base station 320 may generate eMBB data520 for transmitting at operation 410. It may also be possible togenerate URLLC data (or URLLC traffic) 530. If the resources (resourceelements (REs)) for transmitting the URLLC data 530 are insufficient,the base station 320 may puncture a portion of the eMBB data region 520.

At operation 420, the base station 320 may transmit eMBB data 520 to theterminal 310. A portion of the eMBB data is punctured and replaced bythe URLLC data 530. The base station 320 may transmit the firstinterference impact information 540, 543, 545, and 547 during the eMBBTTI 500 carrying the URLLC data 530. The eMBB TTI 500 may include aneMBB control channel (eMBB physical downlink control channel (PDCCH))523 for use in transmitting eMBB data 520, the eMBB control channelbeing arranged in a first mini-slot 519. Although FIG. 5 depicts thatthe eMBB PDCCH 523 occupies a portion of the first mini-slot 519, it mayalso be possible to fill the whole space of the first mini slot 519 witheMBB PDCCH.

During the eMBB TTI 500 carrying the URLLC data 530, coarse URLLCresource allocation information may be transmitted. The firstinterference impact information 540, 543, and 545, and 547 may includethe coarse information on the resources allocated for the URLLC data530.

For example, the resource allocation information for the URLLC data 530may be transmitted to the terminal 310 in unit of mini-slot group or PRBgroup.

At operation 430, the terminal 310 may detect the first interferenceimpact information 540, 543, 545, and 547 and decode the eMBB data 520based on the first interference impact information 540, 543, 545, and547. The terminal 310 may perform blind detection based on the coarseinterference impact information to acquire fine resource allocationinformation for the URLLC data 530. The terminal 310 may also decode theeMBB data 520 based on the resource allocation information for the URLLCdata 530. The terminal 310 may perform decoding on the URLLC data 520with the exception of the resource region for the URLLC data 530. Forexample, the terminal 310 may set a log-likelihood ratio (LLR) for thesignal received in the URLLC resource region 530 to 0 to performdecoding in the remaining eMBB data region 520.

If an error occurs in the eMBB data even though the terminal 310 hasperformed decoding on the eMBB data region 520 using the URLLC resourceallocation information (first interference impact information) as above,the terminal 310 may request to the base station 320 for retransmissionat operation 440. If an error (block error) occurs in the eMBB dataregion 520, the terminal 310 may transmit a NACK message to the basestation 320. Otherwise, if no error (block error) occurs in the eMBBdata region 520, the terminal 310 may transmit an ACK message to thebase station 320.

If the base station 320 receives an ACK message from the terminal 310 atoperation 440, the base station 320 may generate and transmit a nexttransmission signal to the terminal 310.

Otherwise, if the base station 320 receives a NACK message from theterminal 310 at operation 440, the base station 320 may generate aretransmission signal at operation 450.

During the retransmission eMBB TTI 600, the base station 320 mayexplicitly transmit fine information on the URLLC data 530 in additionto the indication information (i.e., first interference impactinformation 540, 543, 545, and 547) carried in the previous TTI (i.e.,eMBB TTI 500 carrying the URLLC data). The second interference impactinformation may include fine resource allocation information for theURLLC data 530. The second interference impact information may betransmitted to the terminal 310 via a PDCCH (eMBB PDCCH) 623. The secondinterference impact information may be included in a DCI of the PDCCH623. According to an embodiment of the disclosure, the secondinterference impact information may be transmitted through predeterminedregions 640, 643, 645, and 647 of the eMBB data channel 620.

In this case, the base station 320 may assume that the terminal 310 hasreceive the first interference impact information 540, 543, 545, and 547transmitted during the eMBB TTI 500 carrying the URLLC data erroneously.

In order to accomplish this, it may be necessary to design a method fortransmitting the first interference impact information 540, 543, 545,and 547 with a high reliability during the eMBB TTI 500 carrying URLLCdata.

For example, it may be considered to apply a low code rate (e.g.,repetitive transmission) or perform transmission with a long sequence.

Also, there is a need of a transmission scheme for overcoming the fadingchannel problem. For this purpose, it may be necessary to use atransmission scheme capable of achieving a diversity effect.

According to an embodiment of the disclosure, the second interferenceimpact information being transmitted during the retransmission eMBB TTI600 may indicate the resource allocation information for the URLLC data530 in a mini-slot group of the eMBB TTI 550 carrying the URLLC data bymini-slot position and/or PRBs positions. In this way, it may bepossible to reduce interference impact information transmission overhead(indication overhead).

If a NACK message is received at operation 440, the base station 320 maygenerate second interference impact information at operation 450 andtransmit a retransmission signal including the second interferenceimpact information to the terminal 310 at operation 460.

At operation 470, the terminal 310 may detect the second interferenceimpact information and combine the retransmission signal and thepreviously received signal based on the second interference impactinformation. The terminal 310 may combine the eMBB data, with theexception of the URLLC data 530, received during the eMBB data region520 and the retransmitted eMBB data 620 based on the resource allocationinformation contained in the URLLC data 530 indicated by the secondinterference impact information. For example, the terminal 310 may setthe LLR for the signal received in the URLLC resource region 530 to 0and combine the remaining eMBB data region 520 and the retransmittedeMBB data 620.

If an error block is detected even after combining the data, theterminal 310 may transmit an NACK message to the base station 320.Otherwise, if no error block is detected after combining the data, theterminal 310 may transmit an ACK message to the base station 320.

As described above, the first interference impact information 540, 543,545, and 547 being transmitted at operation 420 may include coarseresource allocation information for the URLLC data 530.

For example, the first interference impact information may include 4indication information 540, 543, 545, and 547. The first interferenceimpact information may include the first indication information 540mapped to region A of the first mini-slot group 510, the secondindication information 543 mapped to region B of the first mini-slotgroup 510, the third indication information 545 mapped to region C ofthe second mini-slot group 515, and the fourth indication information547 mapped to region D of the second mini-slot group 515. The regions Aand B may be spaced at an interval of a predetermined number of resourceblocks (RBs), and the regions C and D may also be spaced at an intervalof a predetermined number of RBs. For example, the regions A and B maybe spaced at the interval of 16 RBs.

Although it is depicted that the first indication information 540 andthe second indication information 543 are mapped to the third mini-slot513 among the second to fourth mini-slots 511, 512, and 513 composingthe first mini-slot group 510, the configuration is not limited thereto.For example, it may also be possible to map the first indicationinformation 540 and the second indication information 543 to the secondmini-slot 511 with the exception of the third mini-slot 512 to which theURLLC data 530 is mapped. It may also be possible to map the firstindication information 540 to the second mini-slot 511 and the secondindication information 543 to the fourth mini-slot 513. Likewise,although it is depicted that the third indication information 545 andthe fourth indication information 547 are mapped to the seventhmini-slot 518 among the fifth to seventh mini-slots 516, 517, and 518composing the second mini-slot group 515, the configuration is notlimited thereto.

The first to fourth indication information 540, 543, 545, and 547 mayinclude the information indicating whether any URLLC data 530 are mappedto the first and second mini-slot groups 510 and 515, respectively. Theindication information 540, 543, 545, and 547 may also include theinformation indicating whether the URLLC data 530 is transmitted betweenthe indication information 540, 543, 545, and 547 and next indicationinformation 540, 543, 545, and 547. Each of the indication information540, 543, 545, and 547 may indicate whether there is URLLC data 530 in apredetermined region.

For example, the first indication information 540 may indicate whetherthere is URLLC data 530 in the first mini-slot group 510. The firstindication information 540 may also indicate whether there is URLLC data530 in a first region pre-configured in the first mini-slot group 510,e.g., between the start RB of the eMBB data region 520 and the start RBof the reign B to which the second indication information 543 is mapped.

Likewise, the second indication information 543 may indicate whetherthere is URLLC data 530 in the first mini-slot group 510. The secondindication information 543 may indicate whether there is URLLC data 530in a second region pre-configured in the first mini-slot group 510,e.g., between the start RB of region B and the end RB of the eMBB dataregion 520.

The third indication information 545 may indicate where there is URLLCdata 530 in the second mini-slot group 515 and whether there is URLLCdata 530 in a third region pre-configured in the second mini-slot group515, e.g., between the start RB of the eMBB data region 510 and thestart RB of region D to which the fourth indication information 547 ismapped. The fourth indication information 547 may indicate whether thereis URLLC data 530 in the second mini-slot group 515 and whether there isURLLC data 530 in a fourth region pre-configured in the second mini-slotgroup 515, e.g., between the start RB of region D and the end RB of theeMBB data region 520.

As shown in FIG. 5, the URLLC data 530 may be mapped between the startRB of the eMBB data region 520 and the start RB of region B to which thesecond indication information 543 is mapped in the third mini-slot 512of the first mini-slot group 510.

In this case, the first indication information 540 mapped to the regionA may include the information indicating that the URLLC data 530 istransmitted during the first mini-slot group 510 and there is the URLLCdata 530 in the first region (i.e., between the start RB of the eMBBdata region 520 and the start RB of the region B to which the secondindication information 543 is mapped). The first indication information540 may be a sequence transmission using 4 REs. For example, the firstindication information 540 may be identical with “1 1 −1 −1.”

The second indication information 543 mapped to the region B may includethe information indicating that the URLLC 530 is transmitted during thefirst mini-slot group 510 and there is no URLLC data in the secondregion (i.e., between the start RB of the region B and the end RB of theeMBB data region 520). The second indication information 543 may be asequence transmission using 4 REs. For example, the second indicationinformation 543 may be identical with “1 −1 1 −1”

The third indication information 545 mapped to the region C may includethe information indicating that the URLLC 530 is not transmitted duringthe second mini-slot group 515. The third indication information 545 mayalso include the information indicating that there is no URLLC data inthe third region (i.e., between the start RB of the eMBB data region 520and the start RB of the region D to which the fourth indicationinformation 547 is mapped. The third indication information 545 may be asequence transmission using 4 REs. For example, the third indicationinformation 545 may be identical with “1 1 1 1.”

The fourth indication information 547 mapped to the region D may includethe information indicating that the URLLC data 530 is not transmittedduring the second mini-slot group 515. The fourth indication information547 may also include the information indicating that there is no URLLCdata in the fourth region (i.e., between the start RB of the region Dand the end RB of the eMBB data region 520. Here, the fourth indicationinformation 547 may be a sequence transmission using 4 REs. For example,the fourth indication information 547 may be identical with “1 1 1 1.”

The terminal 310 may perform the operations as follows at operation 430based on the first interference impact information 540, 543, 545, and547 received at operation 420.

First, the terminal 310 may detect the first interference impactinformation 540, 543, 545, and 547 and determine the presence/absence ofthe URLLC data and the resource region for the URLLC data 530.

At this time, it may be possible to apply sequence correlation.

The terminal 310 may detect a mini-slot group and PRB group carrying theURLLC data 530.

For example, the terminal 310 may determine whether there is URLLC data530 during the first mini-slot group 510 or the second mini-slot group515 (mini-slot group detection) and coarsely detect a region carryingthe URLLC data 530 among the first to fourth regions (PRB groupdetection) based on the first to fourth indication information 540, 543,545, and 547. In this embodiment of FIG. 5, the terminal 310 may checkthat there is the URLLC data 530 during the first mini-slot group 510and there URLLC data 530 is mapped in the first region based on thefirst and second indication information 540 and 543. The terminal 310may also check that there is no URLLC data 530 during the secondmini-slot group 515 based on the third and fourth indication information545 and 547.

According to an embodiment of the disclosure, the terminal 310 mayperform blind detection during the detected mini-slot group and in aregion corresponding to the detected PRB group to locate detailedposition of the URLLC data 530.

The terminal 310 may check that the URLLC data 530 is transmitted duringthe first mini-slot group 510 at a coarse position of the first region,i.e., between the start RB of the eMBB data region 520 and the start RBof the region B to which the second indication information 543 ismapped, based on the first interference impact information. However, itis impossible to locate the mini-slot carrying the URLLC data 530 amongthe first to fourth mini-slots 510, 511, 512, and 513 using only thefirst interference impact information. It is also impossible to locateaccurately the RB to which the URLLC data 530 is mapped based on onlythe first interference impact information.

In this case, the terminal 310 may perform blind detection to locateaccurately the mini-slot carrying the URLLC data 530 among the second tofourth mini-slots 511, 512, and 513 and the RB to which the URLLC data530 is mapped.

Afterward, the terminal 310 may set the LLR of the signal received inthe URLLC resource region 530 to 0 and decode the eMBB data 520.

The terminal 310 may determine ACK/NACK depending on whether decodeddata has an error, and then transmit the ACK/NACK information asfeedback to the base station 320 at operation 440.

The base station 320 may perform the operations of operations 450 and460 according to the ACK/NACK feedback received from the terminal 310 atoperation 440.

If the base station 320 receives an ACK message from the terminal 310 atoperation 440, the base station 320 may generate and transmit the nextsignal (e.g., new TB or CB) to the terminal 310 at operation 450.

Otherwise, if the base station 320 receives a NACK message from theterminal 310 at operation 440, the base station 320 may generate an HARQretransmission signal and the second interference impact information tobe transmitted through the PDCCH 623. The second interference impactinformation may include detailed resource allocation information for theURLLC data 530. For example, the second interference impact informationmay include the information on the mini-slot carrying the URLLC data 530and RB to which the URLLC data 530 is mapped.

In the above embodiment, in order to indicate that the URLLC data 530exists in the first mini-slot group 510 but URLLC data 530 does notexist in the second mini-slot group 515, the base station 320 maytransmit the second interference impact information having a bitwidth ofthree bits set to “010.” The individual bits may correspond to therespective mini-slots 511, 512, and 513 composing the mini-slot group510 carrying the URLLC data 530 and indicate presence/absence of theURLLC data 530 in the corresponding mini-slots (e.g., 0 for absence and1 for presence). “010” may indicate that the URLLC data 530 exists inthe third mini-slot 512 but does not exist in the second and fourthmini-slots 511 and 513. According to an embodiment of the disclosure, ifeach of the mini-slot groups 510 and 515 consists of two mini-slots, thesecond interference impact information may have a bitwidth of 2 bits; ifa mini-slot group consists of 4 or more mini-slots, the secondinterference impact information may have a bitwidth corresponding to thenumber of the mini-slots constituting one mini-slot group. The sameprinciple is applied in the descriptions made hereinafter.

In the above embodiment, in order to indicate that the URLLC data 530exists in the first mini-slot group 510 but does not exist in the secondmini-slot group 515 and the URLLC data 530 is mapped to the first region(i.e., between the region A 540 and the region B 543) but is not mappedto the second region (i.e., below region B 543) in the frequency domainduring the first mini-slot group carrying the URLLC data, the basestation 320 may transmit the second interference impact informationhaving a bitwidth of 7 bits set to “010 1110.” Here, the first threebits set to “010” may correspond to the respective mini-slots 511, 512,and 513 composing the mini-slot group 510 and indicate presence/absenceof the URLLC data 530 in the corresponding mini-slots (e.g., 0 forabsence and 1 for presence). The last four bits set to “1110” maycorrespond to 4 frequency resource groups obtained by dividing the firstregion (i.e., between region A 540 and region B 543) indicatepresence/absence of the URLLC data 530 in the respective frequencyresource groups (e.g., 0 for absence and 1 for presence). In referenceto FIGS. 5 and 6, it is shown that the URLLC data 530 is mapped to thethird mini-slot 512 of the first mini-slot group 510 and RB1 to RB12among 16 RBs composing of the first region (i.e., between the start RBof the eMBB data region 520 and the start RB of the region B 543 towhich the second indication information is mapped).

Unlike the description made with reference to FIGS. 5 and 6, the secondinterference impact information may be configured to indicate that theURLLC data 530 does not exist in the first mini-slot group 510 but theURLLC data 530 exists in the second mini-slot group 515.

A description is made of the second interference impact information inthe case where the URLLC data 530 does not exist in both the first andsecond mini-slot groups 510 and 515 unlike the description made withreference to FIGS. 5 and 6. For example, if the first interferenceimpact information indicates that the URLLC data 530 does not exist inthe first and second mini-slot groups 510 and 515, the base station 320may not transmit the second interference impact information. It may alsobe possible for the base station 320 to transmit the second interferenceimpact information with the bitwidth of 2 bits set to “00.” Theindividual bits may indicate whether the URLLC data 530 does not existin the respective mini-slot groups 510 and 515.

A description is made of the second interference impact information inthe case where the URLLC data 530 exists in both the first and secondmini-slot groups 510 and 515 unlike the description made with referenceto FIGS. 5 and 6. For example, if the first interference impactinformation indicates that the URLLC data 530 exists in the first andsecond mini-slot groups 510 and 515 composed of 3 mini-slots each, thebase station 320 may transmit the second interference impact informationwith a bitwidth of 6 bits. The individual bits may indicate whether theeach mini-slot included in the mini-slot groups 510 and 515 carry theURLLC data 530 respectively. It may also be possible for the basestation 320 to transmit the second interference impact information witha bitwidth of 10 bits. In this case, the first to sixth bits mayindicate whether the URLLC data 530 is mapped to the individualmini-slots composing the mini-slot groups 510 and 515, and the seventhto tenth bits may indicate whether the URLLC data 530 is mapped to the 4individual frequency resource groups obtained by dividing the frequencyresources.

Although the description is directed to a situation where the secondinterference impact information has a different bitwidth depending onthe situation of existence of URLLC data 530 in the above embodiment,the disclosure is applicable to the situation where the bitwidth isfixed. For example, it may be possible to transmit the secondinterference impact information with a bitwidth of 7 bits, which are setas described above for the case where the URLLC data 530 exists in oneof the first and second mini-slot groups 510 and 515 and which are allset to “0” for the case where the URLLC data 530 does not exist in boththe first and second mini-slot groups 510 and 515. Further, when theURLLC data 530 is exists in both the first mini slot group 510 and thesecond mini slot group 515, it may also be possible to grouping threemini slot group including two mini slots and indicates whether the URLLCdata 530 exists in the each mini slot group using 3 bits, and dividefrequency resources to 4 groups and indicates whether the URLLC data 530is exists in the each group using the remaining 4 bits.

The terminal 310 may perform the operation as follows at operation 470based on the second interference impact information received atoperation 460.

The terminal 310 may acquire the second interference impact informationfrom the PDCCH 623. The terminal 310 may identify the position of theURLLC data 530 based on the previously received first interferenceimpact information and the currently received second interference impactinformation.

For example, the terminal 310 may identify the presence of the URLLCdata 530 in the first region of the first mini-slot group 510 based onthe first interference impact information. The terminal 310 may alsoidentify that the URLLC data 530 is mapped to RB 1 to RB 12 of the firstregion of the second mini-slot 512 (i.e., third mini-slot) of themini-slot groups indicated by the first interference impact informationbased on the second interference impact information.

The terminal 310 may set to LLR of the signal received in the URLLCresource region 530 to 0, combine the received signal with aretransmission signal, and perform decoding on the combined signal. Theterminal 310 may determine ACK or NACK according to the decoding resultsand then transmit ACK/NAC feedback to the base station 320.

Second Embodiment

FIG. 7 is a signal flow diagram illustrating an indication informationconfiguration and transmission method according to another embodiment ofthe disclosure, FIG. 8 is a diagram illustrating a method fortransmitting first interference impact information for the case wherethe eMBB and URLLC services coexist according to another embodiment ofthe disclosure, and FIG. 9 is a diagram illustrating a method fortransmitting second interference impact information for the case wherethe eMBB and URLLC services coexist according to another embodiment ofthe disclosure.

Referring to FIGS. 7 to 9, the base station 320 may generate eMBB data820 at operation 710. It may also be possible to generate URLLC data (orURLLC traffic) 830. If the resources (REs) for transmitting the URLLCdata 830 are insufficient, the base station 320 may puncture a portionof the eMBB data in the eMBB data region 820.

At operation 720, the base station 320 may transmit eMBB data 820 to theterminal 310. A portion of the eMBB data 820 is punctured and replacedby the URLLC data 830. The base station 320 may transmit the firstinterference impact information 840, 843, 845, and 847 during the eMBBTTI 800 carrying the URLLC data 830. The eMBB TTI 800 may include aneMBB control channel (eMBB PDCCH) 823 for use in transmitting eMBB data820, the eMBB control channel being arranged in a first mini-slot 819.Although FIG. 8 depicts that the eMBB PDCCH 823 occupies a portion ofthe first mini-slot 819, it may also be possible to fill the whole spaceof the first mini slot 819 with eMBB PDCCH.

During the eMBB TTI 800 carrying the URLLC data 830, coarse URLLCresource allocation information may be transmitted. The firstinterference impact information 840, 843, and 845, and 847 may includethe coarse information on the resources allocated for the URLLC data830.

For example, the resource allocation information for the URLLC data 830may be transmitted to the terminal 310 in unit of mini-slot group or PRBgroup.

At operation 730, the terminal 310 may detect the first interferenceimpact information 840, 843, 845, and 847 and decodes the eMBB data 820based on the first interference impact information 840, 843, 845, and847. The terminal 310 may perform blind detection based on the coarseinterference impact information to acquire fine resource allocationinformation for the URLLC data 830. The terminal 310 may also decode theeMBB data 820 based on the resource allocation information for the URLLCdata 830. The terminal 310 may perform decoding on the URLLC data 820with the exception of the resource region for the URLLC data 830. Forexample, the terminal 310 may set a LLR for the signal received in theURLLC resource region 830 to 0 to perform decoding in the remaining eMBBdata region 820.

If an error occurs in the eMBB data 820 even though the terminal 310 hasperformed decoding on the eMBB data region 820 using the URLLC resourceallocation (first interference impact information as above, the terminal310 may request the base station 320 for retransmission at operation740. If an error (block error) occurs in the eMBB data region 820, theterminal 310 may transmit a NACK message to the base station 320.Otherwise, if no error (block error) occurs in the eMBB data region 820,the terminal 310 may transmit an ACK message to the base station 320.

At this time, the terminal 310 may transmit to the base station 320 thefirst interference impact information (whole or part) along with theNACK.

The base station 320 may determine whether the terminal 310 has detectedthe first interference impact information without error based on thefeedback information corresponding to the first interference impactinformation received from the terminal 310.

If the base station 320 receives an ACK message from the terminal 310 atoperation 740, the base station 320 may generate and transmit a nexttransmission signal to the terminal 310 at operation 750.

Otherwise, if the base station 320 receives a NACK message from theterminal 310 at operation 740, the base station 320 may generate aretransmission signal at operation 750. The base station 320 maygenerate the second interference impact information to be transmittedalong with the retransmission signal based on the feedback informationcorresponding to the first interference impact information received fromthe terminal 310.

If an error has occurred in the first interference impact informationdetected by the terminal 310, the base station 320 may transmit thesecond interference impact information that is more detailed than thefirst interference impact information in performing HARQ retransmission.

For example, the base station 320 may transmit to the terminal 310 thesecond interference impact information including the index of themini-slot 812 having a punctured portion among all mini-slots 811, 812,813, 816, 817, and 818 and the indices of the punctured PRBs among allPRBs.

If no error has occurred in the first interference impact informationdetected by the terminal 310, the base station 320 may not transmitredundant information on the punctured eMBB resources in performing HARQretransmission.

For example, if the initial transmission (i.e., first interferenceimpact information) carries full information on the resource allocationfor URLLC data 830, no interference impact information may be includedin retransmission.

If the initial transmission (i.e., first interference impactinformation) carries information on only the mini-slot group having theURLLC data 830 rather than full resource allocation information for theURLLC data 830, an index of the mini-slot in the corresponding mini-slotgroup 810 is included in retransmission. Here, the second interferenceimpact information may include the information on the mini-slot and OFDMsymbols to which the URLLC data 830 is mapped.

If the initial transmission (i.e., the first interference impactinformation) carries the information on the PRB group in which the URLLCdata 830 exists rather than full resource allocation information for theURLLC data 830, the indices of the PRBs to which the URLLC data 830 ismapped in the corresponding PRB group are included in retransmission.

The second interference impact information may be transmitted to theterminal 310 through the PDCCH (eMBB PDCCH) 923. The second interferenceimpact information may be transmitted by means of the DCI of the PDCCH923. According to an embodiment of the disclosure, the secondinterference impact information may be mapped to predetermined regions940, 943, 945, and 947 in the eMBB data channel 920.

If the base station 320 receives a NACK message at operation 740, thebase station 320 may transmit to the terminal 310 a retransmissionsignal including the second interference impact information generated atoperation 750.

At operation 770, the terminal 310 may detect the second interferenceimpact information and combine the retransmission signal and thepreviously received signal based on the second interference impactinformation. The terminal 310 may combine the eMBB data 720 transmittedin the eMBB data region 820 with the exception of the URLLC data 830 andthe retransmitted eMBB data 920 based on the resource allocationinformation for the URLLC data 830 in the second interference impactinformation. For example, the terminal 310 may set the LLR for thesignal received in the URLLC resource region 830 to 0 and combine theremaining eMBB data region 820 and the retransmitted eMBB data 920.

If a block error is detected even after combining the data, the terminal310 may transmit an NACK message to the base station 320. Otherwise, ifno error block is detected after combining the data, the terminal 310may transmit an ACK message to the base station 320.

As described above, the first interference impact information 840, 843,845, and 847 being transmitted at operation 720 may include coarseresource allocation information for the URLLC data 830.

For example, the first interference impact information may include 4indication information 840, 843, 845, and 847. The first interferenceimpact information may include the first indication information 840mapped to region A of the first mini-slot group 810, the secondindication information 843 mapped to region B of the first mini-slotgroup 810, the third indication information 845 mapped to region C ofthe second mini-slot group 815, and the fourth indication information847 mapped to region D of the second mini-slot group 815. The regions Aand B may be spaced at an interval of a predetermined number of RBs, andthe regions C and D may also be spaced at an interval of a predeterminednumber of RBs. For example, the regions A and B may be spaced at theinterval of 16 RBs.

Although it is depicted that the first indication information 840 andthe second indication information 843 are mapped to the third mini-slot813 among the second to fourth mini-slots 811, 812, and 813 composingthe first mini-slot group 810, the configuration is not limited thereto.For example, it may also be possible to map the first indicationinformation 840 and the second indication information 843 to the secondmini-slot 811 with the exception of the third mini-slot 812 to which theURLLC data 830 is mapped. It may also be possible to map the firstindication information 840 to the second mini-slot 811 and the secondindication information 843 to the fourth mini-slot 813. Likewise,although it is depicted that the third indication information 845 andthe fourth indication information 847 are mapped to the seventhmini-slot 818 among the fifth to seventh mini-slots 816, 817 and 818composing the second mini-slot group 815, the configuration is notlimited thereto.

The first to fourth indication information 840, 843, 845, and 847 mayinclude the information indicating whether any URLLC data 830 are mappedto the first and second mini-slot groups 810 and 815, respectively. Theindication information 840, 843, 845, and 847 may also include theinformation indicating whether the URLLC data 830 is transmittedcontinuously in the next slot. That is, each of the indicationinformation 840, 843, 845, and 847 may indicate whether there is URLLCdata 830 in a predetermined region.

For example, the first indication information 840 may indicate whetherthere is URLLC data 830 in the first mini-slot group 810. The firstindication information 840 may also indicate whether there is URLLC data830 in a first region pre-configured in the first mini-slot group 810,e.g., between the start RB of the eMBB data region 820 and the start RBof the reign B to which the second indication information 843 is mapped.

Likewise, the second indication information 843 may indicate whetherthere is URLLC data 830 in the first mini-slot group 810. The secondindication information 843 may indicate whether there is URLLC data 830in a second region pre-configured in the first mini-slot group 810,e.g., between the start RB of region B and the end RB of the eMBB dataregion 820.

The third indication information 845 may indicate where there is URLLCdata 830 in the second mini-slot group 815 and whether there is URLLCdata 830 in a third region pre-configured in the second mini-slot group815, e.g., between the start RB of the eMBB data region 820 and thestart RB of region D to which the fourth indication information 847 ismapped. The fourth indication information 847 may indicate whether thereis URLLC data 830 in the second mini-slot group 815 and whether there isURLLC data 830 in a fourth region pre-configured in the second mini-slotgroup 815, e.g., between the start RB of region D and the end RB of theeMBB data region 820.

As shown in FIG. 8, the URLLC data 830 may be mapped between the startRB of the eMBB data region 820 and the start RB of region B to which thesecond indication information 843 is mapped in the third mini-slot 812of the first mini-slot group 810.

In this case, the first indication information 840 mapped to the regionA may include the information indicating that the URLLC data 830 istransmitted during the first mini-slot group 810 and there is the URLLCdata 830 in the first region (i.e., between the start RB of the eMBBdata region 820 and the start RB of the region B to which the secondindication information 843 is mapped). The first indication information840 may be a sequence transmission using 4 REs. For example, the firstindication information 540 may be identical with “1 1 −1 −1.”

The second indication information 843 mapped to the region B may includethe information indicating that the URLLC 830 is transmitted during thefirst mini-slot group 810 and there is no URLLC data in the secondregion (i.e., between the start RB of the region B and the end RB of theeMBB data region 820). The second indication information 843 may be asequence transmission using 4 REs. For example, the second indicationinformation 843 may be identical with “1 −1 1 −1.”

The third indication information 845 mapped to the region C may includethe information indicating that the URLLC 830 is not transmitted duringthe second mini-slot group 815. The third indication information 845 mayalso include the information indicating that there is no URLLC data inthe third region (i.e., between the start RB of the eMBB data region 820and the start RB of the region D to which the fourth indicationinformation 847 is mapped). The third indication information 845 may bea sequence transmission using 4 REs. For example, the third indicationinformation 845 may be identical with “1 1 1 1.”

The fourth indication information 847 mapped to the region D may includethe information indicating that the URLLC data 830 is not transmittedduring the second mini-slot group 815. The fourth indication information847 may also include the information indicating that there is no URLLCdata 830 in the fourth region (i.e., between the start RB of the regionD and the end RB of the eMBB data region 820).

The fourth indication information 847 may be a sequence transmissionusing 4 REs. For example, the fourth indication information 847 may beidentical with “1 1 1 1.”

The terminal 310 may perform the operations as follows at operation 730based on the first interference impact information 840, 843, 845, and847 received at operation 720.

First, the terminal 310 may detect the first interference impactinformation 840, 843, 845, and 847 and determine the presence/absence ofthe URLLC data 830 and the resource region for the URLLC data 830.

At this time, it may be possible to apply sequence correlation.

The terminal 310 may detect a mini-slot group and PRB group carrying theURLLC data 830.

For example, the terminal 310 may determine whether there is URLLC data830 during the first mini-slot group 810 or the second mini-slot group815 (mini-slot group detection) and coarsely detect a region carryingthe URLLC data 830 among the first to fourth regions (PRB groupdetection) based on the first to fourth indication information 840, 843,845, and 847. In this embodiment of FIG. 8, the terminal 310 may checkthat there are the URLLC data 830 during the first mini-slot group 810and URLLC data 830 is mapped in the first region based on the first andsecond indication information 840 and 843. The terminal 310 may alsocheck that there is no URLLC data 830 during the second mini-slot group815 based on the third and fourth indication information 845 and 847.

According to an embodiment of the disclosure, the terminal 310 mayperform blind detection during the detected mini-slot group and in aregion corresponding to the detected PRB group to locate detailedposition of the URLLC data 830.

The terminal 310 may check that the URLLC data 830 is transmitted in thefirst mini-slot group 810 at a coarse position of the first region,i.e., between the start RB of the eMBB data region 820 and the start RBof the region B to which the second indication information 843 ismapped, based on the first interference impact information. However, itis impossible to locate the mini-slot carrying the URLLC data among thesecond to fourth mini-slots 810, 811, 812, and 813 composing the firstmini-slot group 810 using only the first interference impactinformation. It is also impossible to locate accurately the RB to whichthe URLLC data 830 is mapped based on only the first interference impactinformation.

In this case, the terminal 310 may perform blind detection to locateaccurately the mini-slot carrying the URLLC data 830 among the second tofourth mini-slots 811, 812, and 813 and the RB to which the URLLC data830 is mapped.

Afterward, the terminal 310 may set the LLR of the signal received inthe URLLC resource region 830 to 0 and decode the eMBB data 820.

The terminal 310 may generate ACK/NACK information depending on whetherdecoded data has an error and then transmit the ACK/NACK information asfeedback to the base station 320 at operation 740.

If a NACK situation occurs, the terminal 310 may store the LLR beforeapplying the first interference impact information 840, 843, 845, and847 to perform HARQ combining.

Then, the terminal 310 may transmit the feedback corresponding to thefirst interference impact information to the base station 320. At thistime, the terminal 310 may include whole or part of the firstinterference impact information in the feedback to the base station 320.

For example, the feedback information may have a bitwidth of 4 bits.

The 4-bit feedback information may be set to “1010” to indicate that theterminal 310 has detected the presence of URLLC data 830 in PRBs betweenthe regions A and B (or between regions C and D) of the first mini-slotgroup 810. The 4-bit feedback information may be set to “1001” toindicate that the terminal 310 has detected the presence of URLLC data830 in PRBs below the region B (or region D) of the first mini-slotgroup 810. The 4-bit feedback information may be set to “0110” toindicate that the terminal 310 has detected the presence of URLLC data830 in PRBs between regions A and B (or between regions C and D) of thesecond mini-slot group 815. The 4-bit feedback information may set to“0101” to indicate that the terminal 310 has detected the presence ofURLLC data 830 in PRBs below the region B (or region D) of the secondmini-slot group 815. Although the description is directed to the case ofusing 4-bit feedback information in the above embodiment, it is obviousthat the bitwidth of the feedback information is not limited to 4 bitsbut may be decreased or increased. For example, the feedback informationmay have a bitwidth of 2 bits and, in this case, the frequency domainresource information is not indicated.

In the embodiment of FIG. 8 where the URLLC data 830 exists in PRBsbetween the regions A and B of the first-mini-slot group 810, if theterminal 310 has detected the first interference impact informationwithout an error, it may transmit the feedback information set to “1010”to the base station 320. If the first interference impact informationdetection result has an error, the terminal 310 may transmit otherfeedback information other than the feedback information set to “1010”to the base station 320.

The base station 320 may perform the operations as follows at operation750 and 760 based on the ACK/NACK feedback received from the terminal310 at operation 740.

If the base station 320 receives an ACK message from the terminal 310 atoperation 740, the base station 320 may generate and transmit the nextsignal (e.g., new TB or CB) to the terminal 310 at operation 750.

Otherwise, if the base station 320 receives a NACK message from theterminal 310 at operation 740, the base station 320 may generate an HARQretransmission signal. At this time, the base station 320 may generatethe second interference impact information to be transmitted along withthe retransmission signal based on the feedback information received atoperation 740.

For the above operations, the base station 320 may determine whether thefirst interference impact information detection result of the terminal310 has an error based on the feedback information. In the case of FIG.8 where the URLLC data 830 exists in PRBs between the regions A and B ofthe first mini-slot group 810, if the terminal 310 transmits thefeedback information set to “1010,” the base station 320 may determinethat the first interference impact information detection result of theterminal 310 has not error. However, if the terminal 310 transmit to thebase station 320 the feedback information set to a value other than“1010,” the base station 320 may determine that the first interferenceimpact information detection result of the terminal 310 has an error.

If it is determined that the first interference impact informationdetection result of the terminal 310 has not error based on the feedbackinformation from the terminal 310, the base station 320 may not transmitthe information on the punctured eMBB resource (e.g., resource allocatedfor URLLC data) that is overlapping with the first interference impactinformation in performing HARQ retransmission.

The base station 320 may generate the second interference impactinformation to be transmitted to the terminal 310 along with the HARQretransmission signal through the PDCCH 923. The second interferenceimpact information may include the detailed information on the resourceallocated for the URLLC data 830. For example, the second interferenceimpact information may include the information on the mini-slot and RBsto which the URLLC data 830 is mapped. According to an embodiment of thedisclosure, the second interference impact information may include theinformation on whether the first interference impact informationdetection result of the terminal 310 has an error.

As described above, the information on the resource allocated for theURLLC data 830 that is overlapping with the first interference impactinformation may not be included in the second interference impactinformation. For example, if the first interference impact informationincludes the information on the mini-slot group and PRB group in whichthe URLLC data 830 exists, the second interference information may notinclude the information on the mini-slot group and PRB group in whichthe URLLC data 830 exists. Instead, the second interference impactinformation may include the information on the mini-slot to which theURLLC data 820 is mapped in the corresponding mini-slot group and PRBsto which the URLLC data 830 is mapped in the corresponding PRB group.The terminal 310 may combine the first and second interference impactinformation to check the accurate position of the resource allocated forthe URLLC data 830.

For example, the first interference impact information may indicate thefirst mini-slot group 810 and the first region. The second interferenceimpact information may indicate the second mini-slot and RB 1 to RB 12.In this case, the terminal 310 may identify that the URLLC data 830 ismapped to the second mini-slot 812 of the first mini-slog group 810(i.e., third mini-slot) and RB 1 as the start RB of the eMBB data region820 and RB 12.

The first interference impact information may indicate the firstmini-slot group 810 and the second region. The second interferenceimpact information may indicate the second mini-slot and RB 1 to RB 12.In this case, the terminal 310 may identify that the URLLC data 830 ismapped to the second mini-slot 812 of the first mini-slot group (i.e.,third mini-slot) and RB 1 as the start RB of the region B to which thesecond indication information 843 to RB 12.

The second interference impact information may have extra bits accordingto the presence of URLLC data 830 and whether the first interferenceimpact information detection result has an error. If the firstinterference impact information detection result has no error in asituation where the URLLC data 830 exists in one of the first and secondmini-slot groups 810 and 815 as shown in FIGS. 8 and 9, the secondinterference impact information may have a bitwidth of 8 bits. In thiscase, the first bit may indicate whether the first interference impactinformation detection result has an error, and the next three bits mayindicate mini-slot 812 to which the URLLC data 830 is mapped in themini-slot group 810 indicated by the first interference impactinformation as the mini-slot group in which the URLLC data 830 exists.The last four bits may indicate the RBs to which the URLLC data 830 ismapped in the PRB group indicated by the first interference impactinformation as the PRG group in which the URLLC data 830 exists.According to an embodiment of the disclosure, if the mini-slot groups810 and 815 each are composed of 2 mini-slots, the second interferenceimpact information may have 2 bits representing the respectivemini-slots to indicate presence/absence of URLLC data 830 mappedthereto; if the mini-slot groups 810 and 815 each are composed of 4 ormore mini-slots, the second interference impact information may havebits representing, and equal in number to, the respective mini-slots toindicate presence/absence of URLLC data 830 mapped thereto. The sameprinciple is applied in the descriptions made hereinafter.

In the embodiment of FIGS. 8 and 9, the URLLC data 830 is mapped to thethird mini-slot 812 of the first mini-slog group 810 (i.e., thirdmini-slot among total 7 mini-slots) and RB 1 to RB 12 among the 16 RBsof the first region (i.e., from the start RB of the eMBB data region 820and the start RB of the region B to which the second indicationinformation 843 is mapped).

In this case, the base station 320 may generate the second interferenceimpact information indicating that the URLLC data 830 is mapped to thethird mini-slot 812 of the first mini-slog group 810 (i.e., thirdmini-slot among total 7 mini-slots) and RB 1 to RB 12 among the 16 RBsof the first region and transmits the second interference impactinformation to the terminal 310.

For the above indication, the second interference impact information maybe set to “0 010 1110.” In this case, the first bit set to “0” mayindicate that the first interference impact information detection resultof the terminal 310 has no error. The next three bits set to “010” mayindicate that the URLLC data 830 is mapped to the second mini-slot 812of the mini-slot group 810 (i.e., third mini-slot among total 7mini-slots) indicated by the first interference impact information asthe mini-slot group in which the URLLC data exists. The last four bitsset to “1110” may indicate that the URLLC data 830 is mapped to the RB 1and RB 12 of the 16 RBs composing the first region. The 16 RBs may besorted into 4 groups each having 4 RBs such that it is possible toindicate the RBs to which the URLLC data 830 is mapped with 4 bits.

If the first interference impact information detection result has anerror in a situation where the URLLC data 830 exists in one of the firstand second mini-slot groups 810 and 815 as shown in FIGS. 8 and 9, thesecond interference impact information may have a bitwidth of 15 bits.In this case, the first bit may indicate whether the first interferenceimpact information detection result has an error, and the next six bitsmay indicate mini-slot 812 to which the URLLC data 830 is mapped. Thelast eight bits may indicate the RBs to which the URLLC data 830 ismapped in the frequency domain.

Although the description is direction to a situation where the secondinterference impact information has a different bitwidth depending onthe situation of existence of URLLC data 830 and whether the firstinterference impact information detection result has an error, thedisclosure is applicable to the situation where the bitwidth is fixed.For example, if the first interference impact information detectionresult has no error in a situation where the URLLC data 830 exists inone of the first and second mini-slot groups 810 and 815 as shown inFIGS. 8 and 9, the second interference impact information may have abitwidth of 8 bits. If the first interference impact informationdetection result has an error, the second interference impactinformation may maintain the same bitwidth by omitting the informationon the RBs to which the URLLC data 830 is mapped in the frequencydomain.

A description is made of the second interference impact information inthe case where the URLLC data 830 does not exist in both the first andsecond mini-slot groups 810 and 815 unlike the description made withreference to FIGS. 8 and 9. For example, if the first interferenceimpact information indicates that the URLLC data 830 does not exist inthe first and second mini-slot groups 810 and 815 and if the firstinterference impact information detection result of the terminal 310 hasno error, the base station 320 may transmit to the terminal 310 thesecond interference impact information with a bitwidth set to “0.” Thebit value of the corresponding bit indicates that the first interferenceimpact information detection result has no error.

In the above situation, the base station 320 may transmit to the secondimpact information with a bitwidth of 3 bits set to “000.” The first bitindicates that the first interference impact information detectionresult has no error, and the second and third bits indicate that noURLLC data 830 exists in the corresponding mini-slot groups.

However, if the first interference impact information indicates that theURLLC data 830 does not exist in the first and second mini-slot groups810 and 815 and if the first interference impact information detectionresult of the terminal 310 has an error, the base station 320 maytransmit to the terminal 310 the second interference impact informationwith a bitwidth of 3 bits set to “100.” The first bit indicates that thefirst interference impact information detection result has an error, andthe second and third bits indicate that no URLLC data 830 exists in thecorresponding mini-slot groups.

A description is made of the second interference impact information inthe case where the URLLC data 830 exists in both the first and secondmini-slot groups 810 and 815 unlike the description made with referenceto FIGS. 8 and 9. For example, if the first interference impactinformation indicates that the URLLC data 830 exists in the first andsecond mini-slot groups 810 and 815 and if the first interference impactinformation detection result of the terminal 310 has no error, the basestation 320 may transmit the second interference impact information witha bitwidth of 7 bits. In this case, the first bit indicates whether thefirst interference impact information detection result has no error, andthe remaining bits represent the individual mini-slots 811, 812, 813,816, 817, and 818 composing the mini-slot groups 810 and 815 to indicatewhether the URLLC data 830 is mapped to the corresponding mini-slots811, 812, 813, 816, 817, and 818. The base station 320 may also transmitthe second interference impact information with a bitwidth of 11 bits.In this case, the first bit indicates whether the first interferenceimpact information detection result has no error, the second to seventhbits represent the individual mini-slots 811, 812, 813, 816, 817, and818 composing the mini-slot groups 810 and 815 to indicate whether theURLLC data 830 is mapped to the corresponding individual mini-slots 811,812, 813, 816, 817, and 818, and the eighth to eleventh bits indicatewhether the URLLC data 830 is mapped to the 4 individual frequencyresource groups obtained by dividing the frequency resources.

If the first interference impact information indicates that the URLLCdata 830 exists in the first and second mini-slot groups 810 and 815 andthe first interference impact information detection result of theterminal 310 has an error, the base station 320 may transmit the secondinterference impact information with a bitwidth of 7 bits. In this case,the first bit indicates whether the first interference impactinformation detection result has an error, the remaining bits representthe individual mini-slots 811, 812, 813, 816, 817, and 818 composing themini-slot groups 810 and 815 to indicate whether the URLLC data 830 ismapped to the corresponding mini-slots 811, 812, 813, 816, 817, and 818.The base station 320 may also transmit the second interference impactinformation with a bitwidth of 11 bits. In this case, the first bitindicates whether the first interference impact information detectionresult has an error, the second to seventh bits represent the individualmini-slots 811, 812, 813, 816, 817, and 818 composing the mini-slotgroups 810 and 815 to indicate whether the URLLC data 830 is mapped tothe corresponding individual mini-slots 811, 812, 813, 816, 817, and818, and the eighth to eleventh bits indicate whether the URLLC data 830is mapped to the 4 individual frequency resource groups obtained bydividing the frequency resources.

Although the description is directed to a situation where the secondinterference impact information has a different bitwidth depending onthe situation of existence of URLLC data 830 in the above embodiment,the disclosure is applicable to the situation where the bitwidth isfixed. For example, it may be possible for the base station 320 totransmit the second interference impact information with a fixed numberof bits, which set as described above for the case where the URLLC data830 exists in one of the first and second mini-slot groups 810 and 815and which are all set to “0” for the case where the URLLC data 830 doesnot exist in both the first and second mini-slot groups 810 and 815. Itmay also be possible to maintain the fixed bitwidth by grouping themini-slots by 2 to indicate whether the URLLC data 830 exists in theindividual mini-slot groups and adjusting the number of frequencyresource groups in the case where the URLLC data 830 exists in both thefirst and second mini-slot groups 815.

In order to reduce the second interference impact information overhead,it may be possible to adjust the number of mini-slots per mini-slotgroup and the number of frequency resource groups, and part of suchinformation may not be included in the second interference information.

The terminal 310 may perform the operation as follows at operation 770based on the second interference impact information received atoperation 760.

The terminal 310 may acquire the second interference impact informationfrom the PDCCH 923.

The terminal 310 may determine the position of the URLLC data 830 basedon the first and second interference impact information.

The terminal 310 may set the LLR for the signal received in the URLLCresource region 830 to 0, combine the received signal with aretransmission signal, and perform decoding on the combined signal. Theterminal 310 may determine whether ACK or NACK according to the decodingresults and then transmit ACK/NAC feedback to the base station 320.

FIG. 10 is a block diagram illustrating a configuration of a terminalaccording to an embodiment of the disclosure.

Referring to FIG. 10, the terminal 310 according to an embodiment of thedisclosure may include a transceiver 1010 and a controller 1020 forcontrolling overall operation of the terminal 310. The transceiver 101may include a transmitter and a receiver.

The transceiver 1010 may transmit and receive signals to and from othernetwork entities.

The controller 1020 may control the terminal 310 to perform an operationof one of the above described embodiments. For example, the controller1020 may transmit to a base station a first message including theinformation on the timing for the terminal to receive the interferenceimpact information including the information on the interference causedby a second signal of a second system which uses a second TTI to a firstsignal of a first system which uses a first TTI and may receive a secondmessage including the information on the timing for the base station totransmit the interference impact information, the timing beingdetermined based on the information on the timing for the terminal toreceive the interference impact information.

The controller 1020 and the transceiver 1010 may be implemented asseparate devices or an integrated component in the form of a singlechip. The controller 1020 and the transceiver 1010 may be electricallyconnected to each other.

For example, the controller 1020 may be a circuit, anapplication-specific circuit, or at least one processor. The operationsof the terminal may be realized by situating a memory device storing thecorresponding program codes in an arbitrary component of the terminal.The controller 1020 may perform the above-described operations byreading out and execute the program codes stored in the memory device bymeans of a processor or a central processing unit (CPU).

FIG. 11 is a block diagram illustrating a configuration of a basestation according to an embodiment of the disclosure.

Referring to FIG. 11, the base station 320 according to an embodiment ofthe disclosure may include a transceiver 1110 and a controller 1120 forcontrolling overall operations of the base station. The transceiver 1110may include a transmitter and a receiver.

The transceiver 1110 may transmit and receive signals to and from othernetwork entities.

The controller 1120 may control the base station 320 to perform theoperation of one of the above-described embodiments. For example, thecontroller 1120 may receive from a terminal a first message includingthe information on the timing for the terminal to receive theinterference impact information including the information on theinterference caused by the second signal of the second system which usesthe second TTI to the first signal of the first system that uses thefirst TTI and may transmit to the terminal a second message includingthe information on the timing for the base station to transmit theinterference impact information.

The controller 1120 and the transceiver 1110 may be implemented asseparate devices or an integrated component in the form of a singlechip. The controller 1120 and the transceiver 1110 may be electricallyconnected to each other.

For example, the controller 1120 may be a circuit, anapplication-specific circuit, or at least one processor. The operationsof the base station may be realized by situating a memory device storingthe corresponding program codes in an arbitrary component of the basestation. The controller 1120 may perform the above-described operationsby reading out and execute the program codes stored in the memory deviceby means of a processor or a CPU.

It should be noticed that the methods and devices illustrated in anddescribed with reference to FIGS. 1 to 11 are not intended limit thescope of the claims to the disclosure. The disclosure should not beconstrued as being limited to the components, entities, or operatingsteps exemplified in FIGS. 1 to 11 but can be implemented without partof the components without departing the technical concept of thedisclosure.

The above-described operations of the base station 320 and terminal 310can be realized by situating a memory device storing the correspondingprogram codes in an arbitrary component of the base station 320 and theterminal 310. The controller 1120 of the base station 320 and thecontroller 1020 of the terminal 310 may perform the above-describedoperations by reading out and execute the program codes stored in thememory device by means of a processor or a CPU.

The various components, modules composing an entity, a base station, ora terminal may be implemented in the form of a hardware circuit such asa complementary metal oxide semiconductor-based logic circuit, firmware,software and/or a combination of hardware and firmware, and/or asoftware element stored in a machine-readably medium. For example,various electrical structure and methods may be executed by means ofelectric circuits such as transistors, logic gates, and on-demandsemiconductors.

As described above, the disclosure is advantageous in terms ofallocating resources for transmitting data and indication informationefficiently and allowing a terminal to recognize the sources allocatedper service in a wireless communication system providing heterogeneousservices with different characteristics. The disclosure is advantageousin terms of allowing the low priority service which has stolen part ofthe resources allocated thereto for supporting a high priority serviceto perform modulation/demodulation efficiently so as to mitigateperformance degradation.

The disclosure is advantageous in terms of improving a signal receptionefficiency per service by allocating resources for transmitting data andindication information efficiently and configuring the indicationinformation being transmitted at multiple time points to be associatedwith each other in in situation where heterogeneous services areprovided in the wireless communication system.

While the disclosure has been shown and described with reference tovarious embodiments thereof, it will be understood by those skilled inthe art that various changes in form and details may be made thereinwithout departing from the spirit and scope of the disclosure as definedby the appended claims and their equivalents.

What is claimed is:
 1. A method performed by a terminal in a wirelesscommunication system, the method comprising: receiving, from a basestation, configuration information associated with a code block group(CBG) based transmission; receiving, from the base station, first data;transmitting, to the base station, a negative acknowledgement messageassociated with the first data; receiving, from the base station,downlink control information (DCI) including first informationindicating whether a CBG of second data being received is combinablewith same CBG of the first data; receiving, from the base station, thesecond data based on the DCI; and decoding the second data based on thefirst information.
 2. The method of claim 1, wherein at least one of thefirst data and the second data is received based on the CBG.
 3. Themethod of claim 1, receiving the first data further comprises:receiving, from the base station, second information for configuring theterminal to monitor an indication, the second information includinggranularity information associated with the indication; receiving, fromthe base station, the indication based on the second information, theindication includes resource information indicating a resource;identifying that no transmission is intended for the terminal in theresource based on the indication and the granularity information; andreceiving, from the base station, the first data based on theindication.
 4. The method of claim 3, wherein the resource informationindicates a physical resource block (PRB).
 5. The method of claim 1,wherein the configuration information is transmitted in a radio resourcecontrol (RRC) message.
 6. A method performed by a base station in awireless communication system, the method comprising: transmitting, to aterminal, configuration information associated with a code block group(CBG) based transmission; transmitting, to the terminal, first data;receiving, from the terminal, a negative acknowledgement messageassociated with the first data; transmitting, to the terminal, downlinkcontrol information (DCI) including first information indicating whethera CBG of second data being received is combinable with same CBG of thefirst data; and transmitting, to the terminal, the second data based onthe DCI.
 7. The method of claim 6, wherein at least one of the firstdata and the second data is transmitted based on the CBG.
 8. The methodof claim 6, wherein the transmitting the first data further comprises:transmitting, to the terminal, second information for configuring theterminal to monitor an indication, the second information includinggranularity information associated with the indication; transmitting, tothe terminal, the indication based on the second information, theindication includes resource information indicating a resource;identifying that no transmission is intended for the terminal in theresource based on the indication and the granularity information; andtransmitting, to the terminal, the first data based on the indication.9. The method of claim 8, wherein the resource information indicates aphysical resource block (PRB).
 10. The method of claim 6, wherein theconfiguration information is transmitted in a radio resource control(RRC) message.
 11. A terminal in a wireless communication system, theterminal comprising: a transceiver; and at least one processorconfigured to: receive, from a base station via the transceiver,configuration information associated with a code block group (CBG) basedtransmission, receive, from the base station via the transceiver, firstdata, transmit, to the base station via the transceiver, a negativeacknowledgement message associated with the first data, receive, fromthe base station via the transceiver, downlink control information (DCI)including first information indicating whether a CBG of second databeing received is combinable with same CBG of the first data, receive,from the base station via the transceiver, the second data based on theDCI, and decode the second data based on the first information.
 12. Theterminal of claim 11, wherein at least one of the first data and thesecond data is received based on the CBG.
 13. The terminal of claim 11,wherein the at least one processor is further configured to: receive,from the base station via the transceiver, second information forconfiguring the terminal to monitor an indication, the secondinformation including granularity information associated with theindication, receive, from the base station via the transceiver, theindication based on the second information, the indication includesresource information indicating a resource, and identify that notransmission is intended for the terminal in the resource based on theindication and the granularity information.
 14. The terminal of claim13, wherein the resource information indicates a physical resource block(PRB).
 15. The terminal of claim 11, wherein the configurationinformation is transmitted in a radio resource control (RRC) message.16. A base station in a wireless communication system, the base stationcomprising: a transceiver; and at least one processor configured to:transmit, to a terminal via the transceiver, configuration informationassociated with a code block group (CBG) based transmission; transmit,to the terminal via the transceiver, first data; receive, from theterminal via the transceiver, a negative acknowledgement messageassociated with the first data; transmit, to the terminal via thetransceiver, downlink control information (DCI) including firstinformation indicating whether a CBG of second data being received iscombinable with same CBG of the first data; and transmit, to theterminal via the transceiver, the second data based on the DCI.
 17. Thebase station of claim 16, wherein at least one of the first data and thesecond data is transmitted based on the CBG.
 18. The base station ofclaim 16, wherein the at least one processor is further configured to:transmit, to the terminal via the transceiver, second information forconfiguring the terminal to monitor an indication, the secondinformation including granularity information associated with theindication, transmit, to the terminal via the transceiver, theindication based on the second information, the indication includesresource information indicating a resource, and identify that notransmission is intended for the terminal in the resource based on theindication and the granularity information.
 19. The base station ofclaim 18, wherein the resource information indicates a physical resourceblock (PRB).
 20. The base station of claim 16, wherein the configurationinformation is transmitted in a radio resource control (RRC) message.